Be loaded and shot 31 grains IMR 4198 in my 43 Mauser with 380 gr cast bullet. Velocity wasn’t very consistent but I was also not taking care to raise the rifle before firing so as to place powder more against the primer. That might help with the velocity spread. My question is would it be better/beneficial to use some Dacron or poly fill in the case to keep powder against primer? I’ve seen in here people say not to use fillers.
If it’s beneficial can some one tell me how much to use and proper procedure, if it’s something other than just stuff it in over the powder and seat the bullet?