you wont need to crimp in your Browning, all you'll need is a roll crimp in your lever gun. the RCBS, Lyman both have them. Keep the Browning under 28k for pressure the lever gun under 40k although you will most likely never get there anyway as recoil is brutal in that light of a gun. If you choose the FTX bullets you will need to shorten your brass below 2.1 to use them in a levergun. This is not needed in the browning just something to think about before you buy those bullets. If it were me (and its not) I would use the 300gr or 350gr in the marlin and a 405gr in the browning. If you get into casting the RCBS 300 and 400gr RNFPGC work very well in both those rifles! RL7/IMR4198 in the lever gun and AA5744 in the browning. I have 4, 45-70 lever guns and a Magnum research pistol in 45-70, I used a lee crimp die for the first 50rds or so, if I can find it you can have it as I never use it.
matt