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  #11  
Old 09-15-2018, 10:18 PM
Bill K Bill K is offline
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Default .20 cal 32 gr Speer lead free bullets.

Measuring some Nosler flat base, 32 grain HP's (lead) at 0.554 compared to the Speer flat base, 32 grain hp's(lead free) at 0.619, average of what I come up with. Bill K
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  #12  
Old 09-15-2018, 10:25 PM
17tbs 17tbs is offline
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Quote:
Originally Posted by L Rivard View Post
Barrel is an eleven twist. The 28 grains of TAC shows no sign of excess pressure so I will try a little more powder Monday.
If they vary by as much as 2 grains in actual weight then the diffrrence in bore time may be enough to account for the poor grouping. Stack on top of that the other possible problems and I might just use those for case forming or a really close range bullet.
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  #13  
Old 09-16-2018, 12:04 AM
L Rivard L Rivard is offline
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Bullet overall length on this batch I have varies in a sample of about 50 I measured for this reply from .593" to .626". When I tried to sort into groups by length earlier I had an ES of .040".
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