Was looking for bullets that work in my Gauntlet & these fit the bill(the hollow base-like a pellet allows room for bolt probe) I got some 33 gr. that work well cycling thru my .25 clip & a quick chrony had them @ 820 fps. Due to snow, have not been able to test for accuracy, but will compare to 33.9 Jsb's as soon as I can. They are also available in .22. Found on E-Bay for $20 per 100 & quick delivery.