H4350 for 300WSM. Anything better?
- Thread starter Shankedit
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I was thinking those might be a little slow for the 190s but I'm willing to try. I have four pounds of H1000 and about 10 of MagPro leftover from when I was shooting a 7WSM.
Those slower powders are great. May not be able to get enough in the case for the lighter bullets though.
I couldn't get enough N565 in the case. Again, this is the 300 Mega. Similar to 300 wsm. Bullets seated long.
I would like to try H100V, hard h20. Looks like it's similar to N550s burn rate. Just tried to find it online, to no avail. It's not even showing up on gbroker. Let me know if it's available anywhere, please.
Hodgdon lists 72c grains max with a 200 grain bullet and 57200 psi. I popped primers at 71.5 grains with Norma brass and a 200 grain eldx.
As well as many say H4350 works, I would expect R16 and possibly N555 to do well also.
MagnumManiac
Well-Known Member
I will second RL17 being the top powder, RL25 was the top powder prior to RL17 when I played with 25-300WSM, 6.5-300WSM & 33-300WSM. The latter liked RL19 the most.
When I worked up loads for several 300WSM rifles later on, only 2 powders stood out, RL17 & H4350. I tried Supreme 780, as this is what I was told Winchester used, albeit a bulk powder, but never got their ballistics, fell short by 100fps. Still have that powder, great in several other magnums and the above listed wildcats.
Cheers.
When I worked up loads for several 300WSM rifles later on, only 2 powders stood out, RL17 & H4350. I tried Supreme 780, as this is what I was told Winchester used, albeit a bulk powder, but never got their ballistics, fell short by 100fps. Still have that powder, great in several other magnums and the above listed wildcats.
Cheers.
Looks like I misspoke in my earlier post. If you want velocity, RL26 is it.
My case is an improved case but it screams with RL26.
My case is an improved case but it screams with RL26.
I loved RL26 when I had a barrel chambered in 7WSM. It just got too hard to find where I was and that was well before the pandemic craziness. So I started using H1000 and then Magpro.
