jonk
04-06-2010, 09:29 PM
Swiss 1889. 11 gr red dot. Lee 200 gr .309 bullet. Hornady gas check. Bore measures .3075X.298. ACWW.
It's leading a little in the throat but not in the bore beyond. 50/50 lube.
I'm thinking that the 1889 probably has a more generous throat than the K-31 though it LOOKS rather abrupt, I've never made a chamber cast. Nor do I have to seat bullets very deep in the case to get them to chamber.
Still, my initial guess would be a throat that's oversized compared to the bore. While I'm currently sizing at .309, I might bump that up to .311 and see how they chamber and shoot.
Reasonable analysis? Or other suggestions?
It's leading a little in the throat but not in the bore beyond. 50/50 lube.
I'm thinking that the 1889 probably has a more generous throat than the K-31 though it LOOKS rather abrupt, I've never made a chamber cast. Nor do I have to seat bullets very deep in the case to get them to chamber.
Still, my initial guess would be a throat that's oversized compared to the bore. While I'm currently sizing at .309, I might bump that up to .311 and see how they chamber and shoot.
Reasonable analysis? Or other suggestions?