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Perfect thread to ask this question. Just bought a cz carbine 18.5", if I was to chop to say 17" what fps would I lose on 55gn projectiles?
I can tell you with max .223 loads you get 2800 - 2900 fps from a 16" barrel. I think I've cranked over 3000fps with some adventurous loading. Pretty sure I got 53gr V max doing 3100ish from a 16" some time ago.
@Timmay
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