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Old 09-10-2009, 12:52 AM
GLWenzl GLWenzl is offline
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No experience and not sure what twist you have but I have looked into the 75s from a 223 9 twist... was told that a 75 gr HP will stabilize around 3K fps and the longer 75 AM would probably not.

if it’s a factory pencil barrel I am surprised (but happy) that you got the 60s to shoot
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