What's long-range for you anyway? In 300 WSM
I haven't found a reason to switch to 200gr - mine likes 168gr BTs and 165gr AB, which are ballisticaly superior to 500-600yd anyway.
My model 16 take a pretty frickin' long round in the stock box. Without going VLD I can't imagine not getting enough capacity to get 2900+fps out of a 200gr AB.
Barrel length will be shorter on a carry gun which will limit your ability to use that case capacity anyway. 24", I assume?
I'll make some measurements of my .308 and 300 WSM model 16s this weekend and let you know if I find any key differences. This is a cool project, can't wait to see the finished product. My 300 is only 8.1lb with 4.5-14x40 VX-3 in Talley rings, so yours is probably going to be LIGHT!