Overall height. 0.713

Overall length at base 1.540

Overall length at top 0.823

Overall external maximum width 0.521

JWA's chart has three fields, for OAL, OAH, and Internal width. The first two are 1.540 and 0.713. 0We can compute the last by subtracting twice the thickness of the steel from 0.521.

Have I read your measurements correctly?

Bill

Especially on the 52-C Sporter, which is already drilled and tapped for scope use, your personal solution makes a great deal of sense.

BRP

As BRP says, it is the height that differentiates the 3279 hood from the 3278. 

The norm for the medium hood furnished with most Model 70 rifles and the Model 71 is about .605+ whereas the high one for the 52 Sporting is about .705+ [I think.]

Visually, there is only a slight difference but in use, particularly with the 52C and its higher sight line, I found the medium hood doesn't get enough air and light around the bead. My 52C is a very late specimen with the brazed sight ramp, which may exacerbate the issue. 

But you've added some pertinent data to the literature. 

Bill

PS  my personal solution is attached

Apologies for the poor photography. 

If it is marked for .22 Long Rifle only then it is a 69A Match rifle.

Best Regards,

Is this helpful

 52B 70204

jsgwoodsman said
Hi Bill, 
Is this what you’re looking for?

Joel 
  

Joel, does the dial read .613 or .713? There is a shadow on the horizontal scale that precludes my seeing the tenths digit. 

Bill

Blue Ridge Parson said
The distinctive feature of the sight hoods on my Winchester 52 Sporting rifles is the height.  There is some variation, since they are made of spring steel, but mine measure between .705 inches high to as much as .720 inches tall.  By way of contrast, most of the sight hoods on my pre-64 Model 70 rifles are about .670" high. 
BRP  
  

Could you please look at Joel's image, which I've downloaded and attached here? I read his dial indicator as .613, although there is a shadow on the horizontal tenths scale that precludes my reading it as either .6 or .7. Obviously, it should read .713 if the hood is a 3279.  All my 3278 hoods are about .670 as well. 

Is he measuring height the same way you do?

loo

BRP  

jsgwoodsman said
Hi Bill, 
Is this what you’re looking for?

Joel 
  

Joel,  That's it. Thank you for taking your time to do this.

As soon as I get to my laptop and can see the dial indication clearly, Ill record the measurements and post them here for your approval. 

Much obliged.

Bill

This was my grandfather's rifle. It has the 4 groove barrel and smooth trigger. The rear sight is the EW model. My grandfather was a machinist, so I'm assuming he drilled and tapped for the Weaver B4 and tip-off mounts - my dad wasn't sure. I know he swapped the shark, fin sight for the Lyman.

Thanks to anyone that helps me with this.

Jeff

Is this what you’re looking for?

Joel 

It is the height of the hood, measured from the bottom of the edge that slides into the groove, to the top of the hood. 

It is this measurement that distinguishes the 3279/H from the far more common 3278/M. 

Thanks

Bill