i started reloading with the .40S&W Do your one research and buy the books, i use the lyman 49th,Hornady 8TH and the Richard Lee Second Edition( it has plated data). all my loads have been at COL 1.125 and it has worked well for me. I like WIN 231 powder but cant find it any more so i found Win WST works well but no data. i use 180gr 165gr and 155 hollow base all berrys plated and again have been happy, the 180gr has preformed the best for me.as far as crimp goes, i just close the flair. With my dies( RCBS 3 die carb) it is about 1/4 turn down.neck size =od..424 mine od=.422 i use cci sp and win sp primers
Win 231 powder 180 gr fn i like 4.6 gr i missed col in my notes
win 231 powder 180gr fn berrys plated COL 1.132 4.9 gr was good crono at avg 888fps
win 231 powder 180gr Hor XTP JHP COL 1.125 5.1 was good AVG 914 fps
win WST powder 165gr fn HSM plated COL 1.125 5.4gr was good AVG 952.4 fps
win WST powder 155gr hbrn berrys plated COL 1.125 4.8 gr was good AVG 884 fps
win WST powder 180 gr fn berrys plated COL 1.125 was good AVG 882.3
i hope this helps and as always use this info at your oun risk i am not responsible in any way, in any time, in any galaxy, for the way this data is used.
all shot thought a H&K USPc .40