Re: Sendero Advice
one thing i will add, especially for handloaders, is the extreme versatility of the 7RM.
i actually went through this whole exact decision-making process about 15 years ago. i was determined to get a sendero in 300WM, but got a good buy on a 7RM, and bought it. it never fails to amaze me! i initially shot a bunch of different factory stuff, then started working up 175g handloads. my barrel is a 24, so i am not getting the speeds that you guys are generating with the 26in tubes, but it has really shot some fantastic groups.
then, a few years ago, i got a book on longrange hunting for Christmas, and it had a lot of info on the 7RM, and i realized i hadn't even scratched the surface of its potential. i went through a bunch of factory 160, 140 and 139 stuff, and started working up handloads again. one of my favorites is the combined tech 140 gr ballistic tip. another plus has been the recoil! the difference in a 140g and a 175g barnes is VERY noticeable!
it has been very easy to find loads that my gun is happy with across a very wide range of speeds and bullet weights.
i will at least say that the 7RM is a very interesting cartridge, especially for handloaders, and my sendero has been very accurate with a wide range of stuff.