Hi everyone. My brother just bought a 30-378 wetherby mark v accumark that we've been playing with and trying to get shooting. He bought some Norma brass and some 185 berger vlds. We loaded a few with 101gr of h1000 and seated them to the same length off the ogive as factory accubonds. When he fires them its like the brass at the shoulder shrinks and dimples. Ive never seen anything like it or herd of anything like it. Has anyone seen this before? Thanks.
brass doing funny things
- Thread starter mmk
- Start date
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I would guess that you are loading the rounds too light and would bump the charge up a couple grains. Try 103 or 104 grains and see if it does it again. My guess is you will pressure out around 110-111 grains with that bullet.
Reuben
Reuben
dkhunt14
Well-Known Member
My guess is you don't have enough pressure to make the case seal. I have also seen oil or cleaning fluid in the chamber cause this. Matt
Lefty7mmstw
Well-Known Member
+1 on the others ideas on what is going on.
I'd get your charge up to the point where you only have soot on the case neck and no dimpling at all on the case as you are close to collapsing your cases from low start pressure. Drop the air temp a good bit and you could get gas and unburned powder in the action.
I'd get your charge up to the point where you only have soot on the case neck and no dimpling at all on the case as you are close to collapsing your cases from low start pressure. Drop the air temp a good bit and you could get gas and unburned powder in the action.
Doublezranch
Well-Known Member
There are a couple of things that make brass dimple. Too much lube in a reloading die, and too light of a charge. I agree with the rest, bump that powder charge up and you'll be fine.
