Well I finally got my hands on a 450 bushmaster upper. This one is a custom made upper by Trident Arms out of Maine. The owner is selling 450+p ammo for his uppers and is saying hes shooting 300gr xtp mags @ 2500 FPS. The bottom gun is the 450 and the top upper is my 20" RR Varminter. The 450 has a Douglas barrel so its gonaa need some breaking in. As of these groups it's got 50 rounds down the tube. The dot is 3". His garuntee is 1" @ 100 yds once its broke in. The loads i shot were the Hornady Factory FTX rounds. Left is 10 rounds, Right is 5 rounds. Shouldnt have any trouble killing a deer as is, but im sure its only gonna get better.

