I use 140 NBT's, 140 partitions, and rem 140 psp's all over 63 gr. of RL22. I don't have access to a chronograph any more so I can't tell you how fast they are being pushed. Strange part is that they all "pattern" to the same area at 100 yds yet all will bust soda cans at 300 shot after shot. My gun sucks at 100 but groups a solid 2" at 300. Go figure.....Last week I took three deer with the 140 partitions. Didn't recover any bullets but the deer went down faster than clicking off the lights.