So my buddy bought a 300 WM built on a TC action from a member. Got tons of info from the seller from reloading, round count, just amazing OCD information kept on the rifle. Original loads are with 195 Sierra TMK and from Illinois. We are in central NC and was shooting today. Noticed anything around 2850-2875 for ***** were great. Anything over 2895-3000+ started opening up. I can vouch for my friend (the new owner) as a shooter, as he is a combat marine marksman and has taught me things I do wrong and helped my longer range shooting. The barrel is a 1:9 twist 26" heavy contour barrel. OG owner was using N170 as his powder but not sure the exact load. Should I look at going with a little faster powder, different (heavier or lighter) bullet, etc? Now it was holding around a little over 1 - 1.5 MOA at 200 yards. But the targets sent with the rifle and verified showed .2 - .3" groups at that distance and a target out to 1500 yards with less around a minute group. I know there are a lot of variables in play here as far as shipping ( shipped no scope and was mounted and torqued to spec and rechecked after our session) shooter, location, etc. I just feel it needs a chance at a little faster powder (H4350, H4831, etc) but looking for insight from someone with a little background in this caliber and heavier bullets.
