Re: 220 Swift vs. 22-250 for varmints...Opinions Please
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my experience with 22-250 brass(250 savage was parent brass) is that they all were 2 to 3 Thou smaller than a standard?? .473 case head diameter. Over sized reamer used to cut chamber causes the problem.I have a 250 savage with same problem, so I use .243 brass reformed & shortened, problem solved. As for your case head separations I think you had or have a headspace problem in the gun or with the reloading creating a headspace problem.
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When you made the 22-250 from 243, did you ever weigh the two cases, or measure the volume difference.
I have thought of making 22-250 from Lapua 243 cases for a 22-250 I have, that should shoot better than it does.
Here, kitty kitty kitty.
LRH member #23