
January 20, 2023

As some of you know, I’ve recently un-scoped my 52C Sporting Rifle and installed a nice condition Lyman 48F and a Redfield #255 ( .360 H) Full Gold Bead.
On Tuesday TxGunNut and I broke loose from our chore lists and went to the club 50-yard range with several .22 rimfires that needed sighting in or to check zero. The 52C was one of them.
Cutting to the chase, using Winchester high velocity long rifle hollow points, my squirrel medicine, the 50 yard point of impact could not be gotten lower than 8 inches above point of aim, with the Lyman’s elevation screw cranked to its lowest setting. (The stop screw in the bridge was well off the receiver flat, so it was not the problem.)
Before it starts, let me address the Usual Suggestions:
1. Use standard velocity ammunition. WHY would I want to do that? The putative purpose of this design is a small game hunting rifle, not a target rifle. Check the WRA ads. Are you telling me Winchester’s premier rimfire hunting rifle that cost as much as a Model 70 Supergrade can’t function at small game hunting distances with hv ammo?
2. Increase the shooting distance to 100 yards. There are few squirrel hunting opportunities in the Great Sequoia forests. 100 yards is at the outer limit of ethical small game shooting with a 22 long rifle cartridge.
3. There is something obstructing the lowest position of the 48F’s bridge because the bottom surface of the bridge is still a quarter inch above flush against the receiver flat. That is possible and I will have to check. I have two elevation screws for this sight, the one installed does not protrude outside the base. The other is longer and would do so.
4. A front sight height of .360 is too low and .375 would solve the problem. No, not even close. Increasing the front sight height by .015 would , according to the algebraic formula of similar triangles, lower point of impact by only an inch. Using the formula and defining the change of POI as 8 inches, the front sight height would need to be about .479″
The 48F has an elevation adjustment range of 60 minutes of angle. At 50 yards, that is a total adjustment range of only 7.5 vertical inches; 15 inches at 100 yards. To me, the goal of a small game rifle should be to enable a 50 yard zero in the middle of the 7.5 inch range of adjustment, thus: -3.75″….0…..+3.75″
In my case, it is going to require, first, seeing that the bridge of the 48F is truly as low as it will go, them choosing a significantly higher front sight, my personal taste running to a Redfield Sourdough.
Unless I have overlooked something, it would appear Winchester’s premier sporting rimfire rifle has been hobbled as a practical hunting tool by the factory’s choice of sights. So many of them were modified for scopes that, by the time the C version came out, perhaps it didn’t matter. Although not nearly so elegant and costly, my Model 62A has been knocking ’em out of the trees since 1949 and giving the Ultimate Relief to Cottonmouths with high speed hollow point Shorts ever since I’ve had it. Now THAT is a real Sporting rifle.
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

November 7, 2015

Tallest Marble bead I have in my bag is .315′. A Lyman 17AMI @ .494″ would solve the problem on paper but would be quite awkward. I’m thinking a Lyman 57E/ES will solve this issue in a more graceful manner. The .360 sight may be a little tall, I have a small assortment of front sights we can try.
Mike

January 20, 2023

Does the 57E have a greater range of elevation?
The 48F was a very expensive acquisition. Before I give up on it, I need to make certain I’m getting the full 60 minutes of elevation adjustment. I need to pull the sight and see whether there’s more available. It may be the longer elevation screw will mostly or completely solve the problem by letting the bridge descend to bottom out on the receiver flat.
The factory hood for the 52 Sporting was the very tall #3279, apparently made of Unobtainium. Most collectors have to settle for the more common #3278, which my gun wears. The front sight in the dovetail when I got the gun was a Lyman 81HA — I believe it is .375 but it may only have been for show. The receiver sight base on the gun was a modified Redfield 70 missing its bridge and the gun wore a Weaver J3 in Redfield rings and base.
But the default factory front sight was the Redfield FGB #255 (.360″).
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

November 7, 2015

Bill-
Best I can tell the mounting arm of the 57E/ES brings it back so it clears the stock, unlike my 58E that I relieved the non-factory stock to accommodate. Lyman’s 57E/ES is commonly used on the 75 Sporting, according to JWA’s book. Apparently it plays nice with the Winchester 103B front sight (.260″). Jeff’s sight chapter took me at least a couple of days to read so there are other combinations that did and could work, depending on availability.
I don’t know if this will work on your 52 Sporting, I wasn’t looking at the receiver on your 52 that closely.
Mike

November 5, 2014

Hi Bill-
I don’t want to insult you by telling you what you already know, but when I read your post this AM my thought was the same as Steve’s. In the lowest position, is the horizontal cross bar of the receiver sight slide all the way down in contact with the base block? Or is something preventing that? There is a set screw in the cross bar that limits travel. It was supposed to allow one to “set” the minimum slide height after sighting in, so that you could remove the slide and return to “zero” automatically upon replacing it. But it limits adjustment (on purpose)…
It’s the thing circled in red on this pic. This is a Lyman 48, but the Lyman 57s have it as well:
I apologize for telling you something you already know, but it wasn’t on your “Usual Suggestions” list above.
Good Luck!!!
Lou
WACA 9519; Studying Pre-64 Model 70 Winchesters

June 1, 2023

The other thing that can limit downward travel of the slide/staff assembly is if the elevation screw, which often does extend below the base of the sight, contacts the stock. That will absolutely prevent adequate downward travel of the staff/slide. That is why a relief cut is often made in the stock for the elevation screw.
BRP

November 7, 2015

OOPS! Just reminded myself how much bigger the 52 receiver is compared to the 75. (Needed an excuse to go safe diving!) I don’t know if they make a mounting arm with the correct radius. Sounds like we missed something, Bill. Looks like we’ll have to make another trip out to the club for more rimfire therapy and some applied engineering.
Mike

January 20, 2023

seewin said
Is the stop screw in the horizontal sight bridge bottoming out on the top of the receiver bridge? I’m sure you’re aware, it’s adjustable.
Steve
Steve, No, the bridge stop screw is well-retracted and there is a lot of clearance between its tip and the receiver flat.
Bill
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

January 20, 2023

Steve, Lou and Timothy, I would think that, at the 48F’s lowest elevation, assuming the tip of the bridge stop screw does not protrude at all from the ventral surface of the bridge, the bridge itself would contact the receiver flat.
In the case of my rifle, at the point of vertical obstruction, there is about a quarter inch of clearance between the bridge and the receiver.
Would any of you confirm that such clearance is not the normal minimum elevation for the 48F bridge?
If not, then BRP likely has the answer. I need to pull the sight and examine the underlying stock. If the “short” elevation screw presently installed is being obstructed and, after the necessary relief cut allows further descent of the bridge, I will see if the bridge can be lowered to bear on the receiver flat. If not, I will install the longer elevation screw and adjust the relief accordingly.
I realize the pointer associated with the 60 minute elevation scale is adjustable and not dispositive, but at the point of bridge obstruction, the pointer was exactly level.with the first hash mark at the top of the scale, indicating minimum elevation. It took me a while to observe there was still air between the bridge and the receiver.
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

June 1, 2023

Bill,
You don’t need a longer elevation screw; you probably need to shorten the one you have. A longer screw would be indicated if you could not get the sight bridge high enough. Since it will not go low enough, and since it is almost certainly the elevation screw contacting the stock that is the problem, you have two courses of action open to you. You can shorten that screw with a file or bench grinder, OR you can make a relief cut in the stock which allows the sight to come to its lowest setting. Here is a pic showing what was commonly done to accomplish this:
BRP

November 5, 2014

Hi Bill-
I know nothing about M52s (that’s Steve’s Department)… The one M52 Sporter to which I have access is a late B Sporter (s/n 84635 B). It is a very high condition gun with what I believe are the original Lyman 48F and Redfield 255 sights. I have never fired this rifle, but now I’m curious…
On this one, with the elevation stop screw retracted and the slide pushed all the way down, the cross bar contacts the base block of the sight. No wood or metal interference. I’m attaching a couple photos showing the cross bar all the way down, and one of the elevation screw from the inside.




Hope these are useful for comparison…
Lou
EDIT: To follow up on what Steve just wrote below, the elevation screw on this sight protrudes about 0.708″ below the cross bar. When all the way down it does not protrude from the base block or make contact with the stock.
WACA 9519; Studying Pre-64 Model 70 Winchesters

March 12, 2008

I have found that the later 48F sights which have the directional arrows on the knobs have a shorter elevation screw than the earlier sights. The shorter screw has a protrusion below the horizontal mounting bar of about .730″, while the earlier sights are .937″ protrusion. The later sights do not require a notch cut into the wood for screw clearance, the earlier ones do require the notch to be fully lowered to the top of the bridge. I have an idea your sight is most likely not original to your rifle. If it were, it would have a notch for the longer screw. Your choices are to carefully add the notch or shorten the screw. With either modification, the horizontal bar should go clear down onto the receiver top of bridge.
Steve

January 20, 2023

Steve, Lou, BRP — After your collective advice, I can better understand why Mother said I should go to law school instead of pursuing an engineering degree. I couldn’t quite get my head around the mechanical principle involved — that to lower the bridge I must lower the elevation screw to which it is connected and which moves it up and down. duh.
Lou, you are right neither the Lyman 48F nor the Redfield #255 are original to the gun, S/N 99076C being an end-of-the-bolt Sporting Rifle. I only recently obtained both sights from BRP, who, in a moment of Christian charity, sold them to his fellow Anglican at (slightly) less than their current eye-watering market price. He furnished me two lengths of elevation screw, the shorter one presently installed but very likely still bearing on the stock.
As you can see from the attached photos taken shortly after I bought the rifle, it came with the body of a Redfield 70 receiver sight, shade tree engineered to poorly fit the receiver. The bare stock photo shows (dimly) an indentation made by some sight’s elevation screw, although not likely the Redfield.
I will remove the Lyman 48. Once free of the stock, I’ll see if the elevation knob will operate to further lower the bridge. If so, I’ll inspect to see how far the elevation screw protrudes from the sight base when the bridge is fully down, and relieve the stock to allow it.
TxGunNut and I will then repair to the range and see if we can get the point of impact to coincide with point of aim at 50 yards. If it should prove to be an inch too high still, I have a ready remedy. A Redfield Sourdough .375 H now rests in my 1950 Model 70 Super Grade .30/06, paired with a Lyman 48 WJS-H. I will install the Redfield #255 in the Model 70 and install the Sourdough in the Model 52. The Model 70 will then be stone “correct” and the 52 will be squirrel-ready.
Hoping to be Spared, I’ll report further.
*** Image attachment removed from post content ***






- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

November 5, 2014

Hi Bill-
If you look closely at the first of the three pictures I posted above, when the 48F sight is all the way down, the bottom edge of the cross bar is actually slightly BELOW the radiused (cylindrical) part of the receiver, nestling (slightly) into the flat milled portion of the receiver top aft of the round section. Downward travel of the slide is limited by contact of the cross bar with the top surface of the sight base, not the receiver…
First thing I’d do is remove the sight (so no interference from any part of the gun) and make sure that the slide will go all the way down until the cross bar contacts the base block. That’s as low as she’ll go… If it won’t then there’s something wonky about the elevation screw. If it will, then I’d see if (how much) the elevation screw protrudes from the sight base. If it’s enough to contact the stock, then you’ve got your answer!!!
I think I’d be more inclined to shorten the screw rather than remove wood from the stock. A Lyman 48J may be pricey, but a M52C Sporter is in an altogether different (loftier) price bracket…
Good Luck!!!
As an aside, a 1950 vintage M70 Super Grade would almost certainly have had a Redfield 254 (0.310″) full gold sight. Prior to the advent of the Monte Carlo stock style in 1952, the front sights on standard contour M70 barrels (regardless of 20-inch, 24-inch or 26-inch length) were 0.310″ tall (Lyman 31W, Winchester 103C, Redfield 254). WADR to Roger Rule, there was no reason why the Redfield full gold on a Super Grade would need to be taller than the Lyman 31W/Win 103C on a Standard rifle. LOP/drop/pitch of the Super Grade stocks was the same as the NRA style Standard stock, and Super Grades didn’t automatically shoot higher simply because they were more expensive…
But when the MC stock came about, Winchester raised the line of sight slightly (presumably to help compensate for the higher position of the shooter’s face relative to the bore). So then they went with the Win 103E and Redfield 255, both 0.360″ tall, and made corresponding changes in the rear (barrel) sights. While there was no ergonomic reason to do so (only to simplify the sight part supply chain), this change eventually filtered onto the remaining low comb NRA stocked rifles as well.
Lou
WACA 9519; Studying Pre-64 Model 70 Winchesters

January 20, 2023

Lou, your dissertation on the correct front.sight for the Model 70 Super Grade of various eras was most helpful. I believe that rifle came to me with a 31W front sight and a Lyman 48WJS-T.
I like your suggested process for diagnosing the Lyman 48F’s perceived ills and will follow it.
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

November 5, 2014

Hi Bill-
Here I go… “Off topic” again…
Regarding factory receiver sights on M70s. EXCEPT for 270 WIN and 30-06 SPRG, the last year that M70s (Standard and Super Grade) were offered with a factory installed Lyman 48WJS was 1949. The others were dropped (along with several chamberings, e.g. 250-3000 SAV and 7 M/M) as part of their “Firearms Simplification Program”.
The last Winchester catalog that listed the Lyman 48WJS option (and only for 270 WIN and 30-06 SPRG) was January 1950. They were all gone by the December 1950 (1951) catalog.
But for the real Geeks, i.e. ME… In 1950 Lyman made several changes in the Lyman 48WJS. Since 1947, they had been made with the coved base block that did not require the rectangular stock inlet. But in 1950 other changes occurred; the slide release return spring was changed from an external leaf spring to an internal coil spring AND “Stayset” knobs were introduced. The January 1950 catalog is the first (and ONLY) catalog to depict/describe the M70 with Lyman 48WJS as having “Stayset” knobs. Here’s the Super Grade page for G7063C and G7064C from January 1950.
Two more interesting clips from the Revised “Firearms Simplification Program of 1951” document. These explain the rationale behind dropping the receiver sight option altogether and (for real trivia fans) show the percentage of orders by Catalog Symbol of the 1950 offerings.


You can see that by 1950, M70 Super Grades with factory 48WJS in 270 WIN and 30-06 SPRG constituted only 0.3% and 0.4% of orders, respectively… People were either going with telescopic sights or installing their own receiver sights aftermarket…
Lou
WACA 9519; Studying Pre-64 Model 70 Winchesters

January 20, 2023

Lou, in 1950 I was in the first grade of elementary school. Age 6. Not a Winchester addict until 1954 but, even then at age 10, I was able to observe the marked preference of my Korean War and World War II veteran neighbors and the friends of my WWii vet father, for high velocity bolt action rifles with telescopic sights.
And I did not grow up in a place anybody would regard as a hunter’s paradise. I later learned the velocity and optical revolution had taken hold even before Pearl Harbor.
My 1950 Supergrade 30/06 had belonged to a local physician and had been consigned to a local shop. It gave no evidence of a scope having ever been mounted; that is, there were no imprints of a base or bases nor traces of dried threadlocker. The particular Lyman 48 WJS on the rifle did not have Stayset knobs, so it probably wasn’t factory installed. Yet, the rifle also had a bright red , genuine Winchester recoil pad and the rifle itself had definitely been hunted. There were various small dents in the wood and one inch-long scar in the forearm checkering I had to steam out. But it had been well cared-for and the metal finish well- preserved.
I later came across a newish 48 WJS-H and put it on instead. It catches on fewer things in the woods. I later replaced the front sight with the Sourdough because I can see it better.
Like my other Winchesters, I bought this one to use in the field and am not allergic to straying from the factory pure Way.
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.

November 5, 2014

Hi Bill-
I’m in about the same boat… One of the two M70 Super Grades in 22 HORNET that I’ve decided to keep is a 1950 rifle my that Dad bought from the original purchaser. It has literally had about half a box of ammo through it. The seller included two boxes of vintage 22 Hornet ammo with the gun, one half empty; the missing shells representing the total number of rounds he’d fired through the gun…
Anyway… It came with a Lyman 48WJS with target knobs installed. I know for a fact that the owner put it there b/c the sale also included the original box the sight came in. Just like Winchester’s assessment above that lead to their discontinuation of the 48WJS option…
I like the gun… You’d be hard pressed to find one in better condition. But the receiver sight is not factory original to the gun. I don’t care…
But it does still have the original Redfield 254…
Best,
Lou
WACA 9519; Studying Pre-64 Model 70 Winchesters

January 20, 2023

Good morning, Lou. Your photo skills have always impressed me — not only because the images are legitimate works of art but also because they so clearly reveal details the collector and aficionado want to study.
Although the Hornet cartridge requires a scope for all but the most highly skilled to utilize its maximum humane range on small varmints, a Model 70 in that caliber and equipped with a good receiver sight has a couple of advantages.
Firstly the Model.70, particularly the Super Grade in Hornet caliber, is not feathery light and the Hornet makes a good walking around varmint rifle. The ones I’ve picked up feel like 9 pounds, scopeless. Weight is nice for offhand shooting but adding a couple more pounds for an all-steel Weaver 8X, much less a big Unertl in gimbal mounts, is not fun for very long.
On the other hand a Lyman 48 can, with practice, allow the Hornet shooter to reach out 100-150 yards on ground hogs and prairie dogs and improve stalking skills in the bargain.
Secondly, the Hornet is the best out-of-the-box turkey cartridge ever invented, although some would argue for the 25/20. Turkeys are not early risers so there’s plenty of light. A scope is just dead weight.
In our Western counties that have a Fall season, stalking the Rio Grande subspecies while wearing snake boots can be more fun than sitting in a patch of prickly pear and thorn brush, even assuming it isn’t home to an irritable Western Diamondback. They rarely hibernate except for January and February.
- Bill
WACA # 65205; life member, NRA; member, TGCA; member, TSRA; amateur preservationist
"I have seen wicked men and fools, a great many of both, and I believe they both get paid in the end, but the fools first." -- David Balfour, narrator and protagonist of the novel, Kidnapped, by Robert Louis Stevenson.
1 Guest(s)
