300wsm 190vld. H4350 or 4381sc loads?

[TexSavage]

Glad I stumbled on this thread. I have a Savage 12 VBSS 26" I am shooting 190vld's using 69 grains of H4831SC with velocity of 3008 and ES of 10. It does shoot .75 moa at 550 yards (3.75" group) using Federal Large rile mag primers and Winchester brass. Issue is I am having an extremely hard time getting H4831SC. May need to start looking at other powders and was thinking about H1000. I'll now add H4350 from your discussions and results. Once my 190s are gone though I will be switching to the 215 Hybrids. Shot some of them and oh my, what a bullet. 65 grains of H4831SC got me 2875 and an ES of 5fps. Easy extracting and prelim group sizing was as good or better than the 190's at 100 yards. Will test at longer ranges once we commence the load development.

 

[Barrelnut]

Glad I stumbled on this thread. I have a Savage 12 VBSS 26" I am shooting 190vld's using 69 grains of H4831SC with velocity of 3008 and ES of 10. It does shoot .75 moa at 550 yards (3.75" group) using Federal Large rile mag primers and Winchester brass. Issue is I am having an extremely hard time getting H4831SC. May need to start looking at other powders and was thinking about H1000. I'll now add H4350 from your discussions and results. Once my 190s are gone though I will be switching to the 215 Hybrids. Shot some of them and oh my, what a bullet. 65 grains of H4831SC got me 2875 and an ES of 5fps. Easy extracting and prelim group sizing was as good or better than the 190's at 100 yards. Will test at longer ranges once we commence the load development.

RL17 works well in these bullet weights as well. It will be so fast that you will have a hard time believing your chrony. The downside might be pressure spikes (though I have not seen them myself). The powder seems to have a long peak pressure spike and can really get a bullet going. It is temp sensitive. I just work my loads up in the summer and use 1.5 FPS per degree temp change in the Shooter app and all works well with it.