I’ve done some shooting with my new Impact M3 22 cal sniper. Not enough to really wring it out and fine tune it. It shot fairly well, but I found that after 100 shots or so, I got a lot of lead fouling. I took the liner out, cleaned it and polished the bore with JB paste. Just for yuks, I slugged it by pushing a couple of pellets and slugs through it with a cleaning rod. They had resistance for the first 6 inches, then no resistance till it got close to the choke area. Examination under a magnifying glass showed very shallow land impressions on half the slug and none on the other half. I feel this liner is not up to snuff and going to speak to FX about a replacement.