The R-P factory ammo I've used was pretty light, and I think it was so loaded because of all the old top break's still in use. I do not think it would be a problem. At $30 bucks a box (local price for factory) I started loading it. I think the dies only cost $25 or so, and I have a great time shooting the .38/200 and Webley. My lighest load is 1.5 grs 231 under the 148gr HBWC, its like shooting a .22 and is accurate at short range but the bullet begins to keyhole at any distance.