For quite a few years, I shot a 210gr. LBT bullet in IHMSA match's out of my 10'' DW,.357. Never shot a 40, but that was my fault. Shot a few 38-39's. My load was 12.5 grs. of W296, out of a Winchester manual. It is a gas checked bullet, so never had a leading problem. Used it to kill one deer, prefer a .44, but, wouldn't hesitat to use it again if I get the chance. gypsyman