I had a Donnie on there, and I kept noticing the pellets was curving when I was shooting them.. looked down in it and yeah. Lol that's been driving me crazy for months. Change the moderator, now its shooting lights out
Have you tried the "o-ring trick"? A small o-ring at the base of 1/2x20 threads (IF that's what you're using) will help keep everything squared off & hopefully end clipping. What gun, caliber & type of moderator adapter OR is it screwed directly to end of barrel?