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True i guess but does the trick out of a 16" barrel alright. 1976 goats, mostly bush shooting, over a period of 5 years havn't complained too much.

Yea my bad,shouldn't make posts after having a few drinks. Forgot to do the maths correctly regarding Coriolis effect, but you got the general idea i guess.

I don't know that I'd say spin drift is basically nothing. For example ( probably not the best ) a .223 cal. 55gr projectile, BC 0.235, MV 2780 fps, zeroed @ 200yds. Using Strelok Pro the results at...