Cabelas has a good sale going on Herter's .45 LC. It's a lead flat nose 250 grain bullet. However I can't find ballistics to how it compares to marked cowboy action loads. On the S & B ballistics (understand that S&B made Herter's ammo)table it showed their 250 grain flat nose to shoot in the 775 FPS range. The Taylirs website on conversions said load under 850 fps range are considered cowboy action and okay to shoot in these conversion cylinders. Just curious as to the actual Herter's 250 LC FPS speed; and whether the SAMMI specs are safe for shooting in my 1858?