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Long Range Hunting & Shooting
Optimum barrel length and twist for 223?
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<blockquote data-quote="Capt. D" data-source="post: 1195006" data-attributes="member: 10225"><p>Wildrose</p><p>As for the recommendation of the 1 in 8 twist rate, from a 22-250 I have shot bullets from 50gr up to 80 gr in a 1 in 8 twist all half minute or better but settled on the 69 gr SMK BTHP for my primary bullet choice. The Nosler 77 gr BTHP is my secondary choice. Both shoot one ragged hole at 100 yds and I have had the SMK's beyond 400 yds maintaining less than half minute accuracy. I have not stepped the Noslers out yet. Granted its not a 223 but a 50 to 80 grain bullet range in a 1 in 8 shouldn't be a problem. I wasn't trying to give an optimum twist for a given bullet weight. Just my own experience. I'm sure at some point a bullet can be spun to fast but I don't know what that threshold is. And no I have not tried the 90's because I don't believe an 8 twist will stabilize it. (A buddy of mine shoots a 1 in 8, 223 and drives tacs throwing 55 grain Hornadys down range)</p><p> </p><p>As far as velocity goes with the 223AI, I don't know I just ordered the barrel a couple of weeks ago from Benchmark. I have an old savage 110 that I am going to do the barrel swap myself and put it into a precision stockworks stock. I would think that It would compare as well, probably wouldn't be doing it except for the fact that I had the action anyway. And its something I want to try doing myself.</p></blockquote><p></p>
[QUOTE="Capt. D, post: 1195006, member: 10225"] Wildrose As for the recommendation of the 1 in 8 twist rate, from a 22-250 I have shot bullets from 50gr up to 80 gr in a 1 in 8 twist all half minute or better but settled on the 69 gr SMK BTHP for my primary bullet choice. The Nosler 77 gr BTHP is my secondary choice. Both shoot one ragged hole at 100 yds and I have had the SMK's beyond 400 yds maintaining less than half minute accuracy. I have not stepped the Noslers out yet. Granted its not a 223 but a 50 to 80 grain bullet range in a 1 in 8 shouldn't be a problem. I wasn't trying to give an optimum twist for a given bullet weight. Just my own experience. I'm sure at some point a bullet can be spun to fast but I don't know what that threshold is. And no I have not tried the 90's because I don't believe an 8 twist will stabilize it. (A buddy of mine shoots a 1 in 8, 223 and drives tacs throwing 55 grain Hornadys down range) As far as velocity goes with the 223AI, I don't know I just ordered the barrel a couple of weeks ago from Benchmark. I have an old savage 110 that I am going to do the barrel swap myself and put it into a precision stockworks stock. I would think that It would compare as well, probably wouldn't be doing it except for the fact that I had the action anyway. And its something I want to try doing myself. [/QUOTE]
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Optimum barrel length and twist for 223?
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