#11
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Also, foxhunter mentioned neck thickness. What rifle are you using? Do you know the neck diameter of your chamber? If you are turning the necks, you might be a little close on the fit of some cases. |
#12
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R700, Criterion Remage barrel 0.232 neck. I turned the necks to end up with 0.228-0.229 loaded diameter. Trimmed to 1.395. Second firing neck sized and headspace datum checked. |
#13
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20 vt
I had one at 20.3 and just moved it down to 20 for pressure reasons. In two other's, I'm also at 20, the forth one seems to like 19.8 with 32vmax but 19gr with 40vmax's is shooting better for the moment. but Ive only had it to the range three times so not done with load devolpment.
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#14
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Harold......
I didn't know you were now shooting a belted 20VT!!!
But then, I didn't know I was shooting a belted 17PPC.......until I did!!! I was breaking-in the barrel, at the time. Kevin |
#15
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#16
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[IMG][/IMG] |
#17
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In my experience 2200 is a different animal, doesn't have the classic peaky pressure curve of a stick powder, it seems to have a very wide pressure curve that you only see visual indicators when you are well over what it will handle.
CCI 400's will let you know when you are above 50K psi (nearly blanked, flattened edges), then switch primers and work up carefully. 20VT is a 60Kpsi rated cartridge, when none of the parent brass rounds go 60K. Might partially be the reason a book load shows issues. |
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