Just did a load with the 225 gr FTX in 45 acp using 4.2 gr of tight group. It work very well. didn't chron it yet but will try monday. I used a block 21sf and feed fine and the slide lock back on the last shot. I put no crimp on it. I ll try a crimp on it tomorrow and report to you guys. If it works out it will replace the Horaday 45 Auto+P 220 gr FlexLock® Critical DUTY for me.