Powders

[ayers21]

Recommendations for powder selection for my 300WSM? Anybody have experience loading this cartridge? (Yes, I'm new at this)

 

[Carlos88]

150-165gr bullets weights use powders in the H4350 range (H4350, IMR4451, etc.). 180s use slightly slower powder like H4831, IMR4831, etc. Consult a good loading manual or online resources. Huge amount of info out there.

 

[ayers21]

150-165gr bullets weights use powders in the H4350 range (H4350, IMR4451, etc.). 180s use slightly slower powder like H4831, IMR4831, etc. Consult a good loading manual or online resources. Huge amount of info out there.

Thank you

 

[LVJ76]

What @Carlos88 mentioned and I'll add RL23 for 168gr, 180gr and 195gr bullets, and H1000 is also a good option for these last two bullet weights.

 

[ayers21]

What @Carlos88 mentioned and I'll add RL23 for 168gr, 180gr and 195gr bullets, and H1000 is also a good option for these last two bullet weights.

Thank you.

 

[Jud96]

For 200-215gr bullets I would recommend RL26.

 

[TexSavage]

H4831SC if you can find it. Used it on 185-215 and it has been outstanding both in accuracy, repeatability, velocities and stable at temps from 0 to 105 F.

 

[ayers21]

H4831SC if you can find it. Used it on 185-215 and it has been outstanding both in accuracy, repeatability, velocities and stable at temps from 0 to 105 F.

I paired that with a 180 SST and it shot very well, I am just looking to try some others, didn't have much of the 4831 to work with.

 

[Dosh]

Like H4350 on the sub-180gr. The rifle loved it with Bergers.

 

[JRY46]

I'm using Superformance behind 168 Barnes TTSX with great results

 

[Mustang72]

Superformance.and magpro

 

[Muddyboots]

RL16 is the pixie dust for 165-180's. If you can find it.

 

[vancewalker007]

Recommendations for powder selection for my 300WSM? Anybody have experience loading this cartridge? (Yes, I'm new at this)

I loaded for 2 300 WSMs for several years. I had very good results from RL17, H4350 , and IMR4451. The RL17 can be affected by temp but gives very good velocities. IMR4451 is very temp stable and does not allow copper to build up. Performance wise I found 4350 and 4451 very similar. I also found in the 2 rifles I loaded for, an A7 Sako and a Kimber Montana with a Douglas barrel, I got the best ES and SD results using standard large rifle primers. You didn't ask about bullets but I got good results from Nosler 180 Accubonds and the Barnes 180 TTSX. I used the Barnes in Africa and on Elk with very good results. But, the most crazy accurate bullet I every shot in both of them was the Berger 190 VLD Hunter. It was crazy accurate for a couple of light barrel hunting rifles.

 

[Muddyboots]

+1 on RL17 but be careful of throat damage. I used it pretty much exclusively in a 300WSM for over 1,000 rounds and boy it was toasted. Fast but definitely temp finicky.