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Mother nature threw a curve ball at me on Tuesday. The temps last week were in the 80’s. This week in the mid to high 60’s. Weather forecast was for the 80’s again. The 2 best groups were still at about the same load as last time. 1.115″ and 1.123″. The others not so good. All over 2″.
I did fire a couple of the Fiochi’s. I’m beginning to think these may be reloads? They shot in the 2800’s but did create heavy bolt lift and flatter primers. I have shot some other 130’s in the 3000 fps range and did not get any pressure signs. Goes to show fps does not necessarily tell the whole story. This powder is creating too much pressure while producing a slower speed. These will be put in the trash can at the range for unfired ammo.
I did not clean the barrel this time. It took 3 foulers and 2 other shots to calm the groups down.
November 7, 2015
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Sounds like you have the load for that bullet, Chuck. Have you concluded this rifle doesn’t do well with a clean bore?
Mike
Clean or dirty this barrel does not shoot it’s best until it has about 5 or 6 rounds through it. If close enough you’d still hit a deer with the first shot. You need to know where your first shot goes with all rifles. I think on Tuesday I will shoot up what I have loaded. Then I will reload the cases with a couple loads varying .1 and .2 grains and call it good. I have several other projects that need my attention. Maybe one of them I might write about?
November 7, 2015
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It’s been an adventure, Chuck. I’m mainly interested in where the first shot goes from a cold bore. I’ll be applying some of what I learned in this thread with a similar project in the near future. I have a sister rifle to the M670 that shot so well for me 35-40 years ago. It’s been a loaner/backup rifle on my brother’s deer lease for last ten years or so and hasn’t seen much use lately. If a shooter 30-06 M70 doesn’t follow me home from Cody next month I’ll explore that cartridge and rifle for awhile. I have an embarrassing supply of 4350 powder on hand and lots of once fired brass. All I need is a couple thousand bullets. If I use a pre-64 M70 I’ll consider writing an article about it.
I had one rifle that won’t shoot clean, it’s been my brother’s “bad weather” hunting rifle (stainless/composite M77) for 10-15 years and it’s shot a truckload of deer and hogs since it was cleaned last. His Winchesters are too pretty to hunt with in ugly weather and that M77 is a great shooter as long as you don’t clean it.
Rifles can have difficult personalities but some are worth getting to know. Sounds like you have that 270 figured out. All things considered it turned out to be a pretty good rifle. Good job!
Mike
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