It's an awesome cartridge. To get the most from it, do like Keith did and have a reamer made. Although we use PMC brass which is very strong, the reamer is spec'd with shorter chamber length so's to use 7Mag brass, minimal neck clearance, and NO freebore. After hearing his results I had to have one built. With 29"Hart barrel, 100's are doing 4010. Trajectory is very flat. In this barrel the 100gr Bal Tip is only so-so accurate, but all three Sierra 100's shoot 1/4". That btsp at 4000 just explodes a rockchuck.