I'd go with the Seekins IMHO.
7 PRC is a good choice. Shoot heavy bullets like the 180 ELD M.
I've got the parts to build a 7-300 PRC, just waiting on the chamber reamer for my Smith to put it together. Wanted a little more horsepower than a 7 PRC since I already have a 7 mm Remington Magnum and a 280 Ai.
i have a 7-300prc in my safe i’ve never shot. my buddy that built mine, chambered up two more that they’ve been shooting for the last few years. berger 175s with 79.5gr of h1000, 3230-3240ish with single digit sd’s