So... Where I'm at with this build is nowhere near where I started. I'm definitely going with the AR-10 platform. It's going to be a thumper, possibly even the hammer of Thor lol. But I'm between the tried and true .358 Winchester and the powerful .350 rem mag. I'm going with a 20" barrel either way. I can get parts either way, the .358 win is a bit cheaper though. If it would be a better gun, I'm not worried about the cost difference, I'm going to be buying it piece by piece and building it over the winter. Is the extra 200-400fps and the coolness factor if the .350 rem mag worth the extra cost, or for black bear at no more than 250yds should I stick with the .358 Winchester?