120 grains at 2000-2200 fps is about right. Cast bullets for the 30 herret, fitted to the throat, most throats are .310, or use 7.62 .310 bullets. I like to shoot heavier bullets myself. I shoot 168 sierras at about 1600-1800 fps. Stout but they never leave a ram, no matter where you hit them. The cast bullets also do very well because they transfer all their energy to the target. I shoot about 1200fps with my standing Unlimited gun and they fall very slow but all go down. The most important thing is to shoot an accurate bullet at about 2000 for jacketed bullets. It won't matter how fast they are going if you can't hit it. BTW, Jim Henry is the one who said to shoot the 7.62 bullets (cheap too) in the 30 herrett. Plus he thinks that if you use 7x30 waters or 375 winchester brass, they will last forever and you can easily, safely bump it up a notch. And this is from the man who put the 6 ounce triggers and fitted all my barrels to the frames. It is so nice to live where we are just for that fact. Daniel aka IronMonkey