I've used the PR bullet .45/.357 sabots with their Dead Center bullets. VERY accurate- I really like them, but don't shoot them anymore because of their high cost. If you want to shoot higher velocities, I'd suggest ordering the orange .357 sabots direct from PR- www.prbullet.com I think the .357 MMP sabots are designed for lower velocities, but I haven't tried them, so I can't say for sure. I've always wanted to play around with some .357 bullets (other than the Dead Centers) but haven't had the time & extra $$$ to invest in it. If you try some out let me know - I'm interested.