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Old 05-19-2022, 02:33 AM
20VarTarg 20VarTarg is offline
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Join Date: Oct 2018
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I know nothing about how to read a reamer print. I do have a factory Cooper Model 38 in 20 VarTarg that will run Lapua brass with no alteration. My cousin also has a factory Cooper Model 38 that will not run Lapua Brass. His chamber is tight toward the rim of the case. Has nothing to do with the neck diameter. That's as much help as I can give regarding the reamer print. What twist barrel are you going to be using??? My 12 twist will not shoot a 40 grain bullet worth a darn. I'd suggest a 10 or 11 twist if you plan to shoot any 40 grain bullets. Just my $0.02
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