Home Forums Reloading Big Game Rifles Powder question for a 300 Weatherby

Most of my loads for my deer hunting rifles I use IMR 4831 powder. For bullets this year I'm going switch to Barnes 180 gr. triple shock bullets. In my Barnes reloading book they had the best luck with H4831SC. I want to experiment with something different, has anybody out there had any good luck with any particular powder?

Back when I loaded for the 300 Wby. I found good results with IMR7828 and 180 grain bullets.

r22

RL-22 is my go to Powder in a 300 Wthby mag

Did you mean RL-22 338rcm?

I've had good luck with H1000, every load I tried got me .5-1" at 100 yards in my old Vanguard Sporter. Below is one of my typical groups using H1000 powder. The bullets I used were Hornady 178 grain A-max's.

+1 on H1000 and IMR7828.

+2 7828 180 gr Accubonds, well below moa.

RL22

r22
r-22
rl-22
R22
R-22
RL-22
and reloder 22 I'd try'em all!!


LMAO!

I get sub-MOA with 82 gr of IMR-7828, Rem brass, 180 gr Partition or Hornady, Fed GM mag primer. You might be abe to go up to 85.0 gr in Weatherby brass.

86 if you're feeling sporty.

84.5 if you believe Nosler III.

86 if your rifle allows and you believe the IMR Handloader's Guide for Smokeless Powders.

I use surplus WC-860 powder (similar to AA8700 or H-870). Fed 215 primer and a Hornady 190gr or Sierra 200gr. Shoots about .75 MOA.

I've been shooting the 300 for about 25 years. When I first started, I used MRP and H-4831 using data from the old Weatherby Guide. It even gave you a "factory equivalent load" (81.5 MRP). When RL-22 came around, it practically identical to MRP so I use them interchangeably. IMR 7828 will yield a bit more velocity, but I get factory specs 3250 or so with MRP or 22 and 180gr bullets. jorge