300 WM Reloading question

ncfireman83

Well-Known Member
Joined
Sep 29, 2022
Messages
312
Location
NC
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.
 
190 gr Berger VLD Hunting bullet, CCI250 primer H4831SC powder shoots 1 hole groups in every gun I've shot. My load is over max listed. Work up powder charge watching for pressure. Nail driver!
 
208gr ELDM or Berger 208gr LRTH shoot lights out in my 300wm. I have a load with 7828ssc and H1000. The sweet spot for my rifle with a 208gr is about 2750fps.
 
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