I'm relatively new to reloading, and have had much success with my handgun loads, but having never reloaded for rifles yet, I need help with this one...
I have been very blessed in that a friend just gave me an old Remington rolling block that has a brand new barrel on it, chambered in 38-55. He also gave me some Winchester brass and bullets for reloading ammo for the gun. The bullets he gave me are Hunter's Supply bullets. As the box says, they are "375 H&H; 260gr. FP; .376" bullets. Here is what the Hunter's Supply website says about these bullets: "38/55, 375 H&H 260 grain FP Lead Bullet for practice shooting, competition matches, medium, large game. This bullet is design for lever action rifles. Designed so you can put on a gas check for maximum velocity. Do not need a gas check for velocity under 1500 fps."
I have 3 different powders on my shelf that I could potentially use for reloading this ammo, but I don't know which powder I should use, or how many grains of either powder to use. And this is where I need help, because I'm not about to just guess. The powders I have that I think would work are: Red Dot, IMR 3130, and Winchester 748.
Any load data suggestions would be greatly appreciated. I really want to figure out a good load before the next deer season rolls around. I thank you in advance for your help.