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Old 04-13-2021, 06:42 PM
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Congratulations, one of my CZ527's is a 1:12 and it loves 40gr Vmaxs as well, I have a unfired by me 527 Varmint in the Laminated stock that should be 1:9.
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Old 04-13-2021, 07:14 PM

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Shooting lighter bullets is why I prefer the slower twist. One of the things I would like to get accurately pinned down is when CZ began the 1-9 twist. I've either read or was told some of the 527 Kevlar Varmints used 1-9, mine was a 1-12 and from 2007 I think. The barrels since been replaced. I've also been told the 1-9 twist began showing up in the Americans around 2009. My 223 Remington American is 2009 and a 1-12. The one that I just purchased is an American profile barrel but with a slightly different stock made in 2012 and a 1-12. When I had the Kevlar Varmint rebarreled I bought a 527 Varmint model to tide me over. Two things I didn't like about it. First it's a factory coarsely bead blasted finish, I don't like the finish at all. And it has a 1-9 twist barrel. This Varmint is still here purely because it will shoot light bullets despite my prejudices. I like the fact CZ now stamps there twist rate. For the most part I use 40 grain bullets up to the 222 Remington and then make the big 25% jump to 50 grainers beginning with the 223 Rem and up in case capacity. Things have been know to be different in the past though and probably in the future also.
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