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What TWIST RATE for which bullet weight

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/17/2016 at 05:36
nralifer View Drop Down
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Thank you Peddler.It's a really interesting forum. Enjoyed Bigdaddy's  pic. Looks familiar. Have a great friend who likes to machine his own bullets for this monster 338 Lapua. He made a 325 gr machined copper bullet about as long as the Texas panhandle that actually shot sub minute of angle groups out to 3-400 yds. (not sure which one now). We wanted to test it at a longer range and so we set up a target at 500 yds. It was a a very cold day (5degrees,and pressure was 30.30 in Hg). Shot three shots, and all the holes looked like Bigdaddy's pic. The funny thing was the group was minute of angle!  We actually spoke to a Hornady ballistician about the phenomenon and he said it was not possible. Glad to see that someone else has witnessed the impossible as well.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/22/2016 at 14:10
DCAMM94 View Drop Down
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I once had groupings like that (consistently) out of my old .243 Encore 15" handgun.  The only thing it would shoot consistently was 85gr, and I had to use compressed loads or the older hornady overcooked loads.  It was a 1-11" I believe.  Now I use a 7-08 barrel with a 1-9 twist, and it will hold a spiral a little better than a Billy Kilmer pass - at least out to 300yds - with up to 140grainers.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/25/2016 at 06:35
nralifer View Drop Down
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Since that experience if there is a question about stability we try and test in cold weather and for 500 yds or better.
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