308 Win / 180gr A-Frames
This is a discussion on 308 Win / 180gr A-Frames within the Up To .375 forums, part of the Firearms & Ammunition category; Seeing how I can't leave well enough alone I had to work up some 180gr A-Frame loads for my son's ...
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05-28-2012, 09:16 AM #1
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308 Win / 180gr A-Frames
Seeing how I can't leave well enough alone I had to work up some 180gr A-Frame loads for my son's .308. I haven't ordered any of the North Forks in this weight yet but had some A-Frames on the bench.
I worked up 43.5, 44, 44.5 and 45gr of RL15. The Swift manual puts 45gr as max. I had some 165gr North Forks loaded up also and shot those first to see if that load would repeat, it did. It shot a rougly 0.75" group as it has now several times.
I then shot the 43.5gr load for the A-Frames at the same bullseye. Those three shots scattered within the 3 previous shots of the North Forks! No change in the scope setting, same POI.
The 44gr and 45gr loads in the A-Frame, same results basically. I had a flier in the 44.5gr load that threw that group out to 1.25". Shooter error or maybe just a harmonic at that weight? Not sure.
I seated the A-Frames to be able to crimp at the cannelure of the bullet using a Lee Factory Crimp Die. This puts the COAL well under max. I was a bit concerned about pressure because of this. But no sticky bolts or other signs on the brass.Bonse Aba
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