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re: A rule of thumb on changing point of impact on fixed sighted guns
Posted on 9/15/14 at 8:12 pm to REB BEER
Posted on 9/15/14 at 8:12 pm to REB BEER
Thought it was more of a trajectory thing because the heavier bullets "rainbow" more. Larger bullets also work better with a less aggressive twist. IIRC
Probably takes more work to twist a heavier bullet.
Probably takes more work to twist a heavier bullet.
This post was edited on 9/15/14 at 8:13 pm
2
Posted on 9/15/14 at 8:34 pm to Hu_Flung_Pu
quote:
arger bullets also work better with a less aggressive twist. IIRC
I think the opposite is true.
Old Colt SP1 rifles with 1:12 twist can't effectively stabilize heavier .223 bullets like the later 1:7 twist models.
This post was edited on 9/15/14 at 8:35 pm
Posted on 9/15/14 at 10:32 pm to Hu_Flung_Pu
quote:
Thought it was more of a trajectory thing because the heavier bullets "rainbow" more.
Are you thinking that a bullet rises when it leaves the barrel?
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