WB
If you or a buddy reload it’s as easy as any
Friday, March 13, 2026, 11:25

Other line of cartridges. The .510 is a little tapered but you basically treat it like a big .45 Colt etc. Many old buffalo cartridges projectiles work. Mainly the .50 “express” cartridges with 300-350 gr. bullets. .50 Spencer, .50-95, or .50-110 Win. etc. It mimics the old buffalo gun ballistics perfectly. I use bullets 0.510-.511” diameter. Gary’s manual shows H110/296 or 4227 propellants. I worked up several loads using more traditional powders like Unique. A velocity of 1000-1200 fps (moderate for what it can do) is way more than anyone would likely need. It will shoot clean through a Bison. How dead can you make something?!

The .429 GNR is a necked cartridge that you treat much like a rifle cartridge. You want to preserve as much neck tension as possible, so go easy on the flairing prior to bullet seating. Also, don’t go crazy trying to do a heavy roll crimp. Again, so you don’t iron out all the neck tension. Bullets of 0.430” and 310 gr. or less seem best. My favored powders are H120/296 using small magnum pistol primers, or 4227.

I’ve truly enjoyed both cartridges and used them successfully on game. Plus the adventures and friends along the way. God bless.