Been testing loads with a Marlin 1895 Cowboy (cut rifling) with the 330 HP bullet with a PB.
I'm loading AA5744. Bullets are WW at around 12.5-13 BHN with WLL blue carnuba. Bullets are sized 2/1,000 over grove diameter and the brass is expanded to 2/1,000 neck tension. A medium crimp with a FCD is used. In the 1,400-1,500 fps range I don't have leading. In the 1,600 - 1,700 range I start getting some small flakes of leading. Is this about what I should expect for this bullet hardness, being plain base, and lubed not PC?
I'm trying to develop a hunting load so don't want to use harder lead. Is this the fps I should expect without going to a bullet with a GC?