I just started shooting the 300gr FTX out of my S&W 500,accuracy is very good.They seem to shoot better faster,unlike alot of bullets I have tried.I am using 52gr. of H110,and my last 3 shot group from 50 yds. was 1".I may try to fine tune the load,but I will be happy if it stay's that good.I haven't had a chance to chrono it yet,but I am guessing it's around 2000fps.