Have a Remington RB 45-70. the barrel is 34" long, (Green Mountain) 18" twist. "What is the best size boolits to use for 100 to 200 yards."? Just putting holes in paper. Was told to use the large 535 for a 18" twist, at 150 yards or so, the boolits look as if they are not stabilizing out. Tried lower loads and high loads, nothing, the same........They are looking good at 300 to 400 yards but our range is only 200 yards. As said it's not for hunting, just holes. (Powder loads.....BP with FFg 70 gr and Smokeness, H-4198 at 31 gr all with 500 to 535 boolits) Thanks for your time beng