Re: 300wsm or 270wsm
For the 300WSM;
RL-17 & a 180 Accubond gets close to 3100 fps.
RL-19 & a 180 gets close, but a touch less velocity than 17.
H-4350 is a performer too.
I'm told that IMR-7828ssc is a solid performer with 200 grain Accubonds.
For the 270WSM,
If your launching 140 Accubonds, look no further than RL-19. It has been the best performer in all three 270WSM's I load for, & countless others on this forum. 3100 fps is Easily attainable in most rifles.
If your looking at launching the Matrix bullets, or the new Bergers, Magpro, Retumbo, & even H-1000 have been noted for velocity.
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