I have a pistol caliber carbine, 45 acp with 16” barrel. After shooting about 15 rounds, I have noticed the first couple of inches of the barrel is badly fouled but it is not leaded up. It takes about 20 with various solvents and brass brushes to clean up the mess.
I am shooting a 200 grain RNFP lead bullets (just like I have shot for the past 10 years in my cowboy guns) with 5.1 grains of Nitro 100 and 3.8 grains of Clay Dot. Both of these powders foul very badly. If I use 4.3 grains of Red Dot, fouling is much less.
Any ideas as to what may be causing the fouling problems? Would a tighter crimp help?
What you think?