Is it possible to rifle a barrel without expensive tools and your own "workshop"? I've seen rifling buttons on the internet and have a Gamo Express Shotgun that I use only for a snake gun because I can't hit anything past 10 yards with pellets in it. If i could even somewhat rifle it, maybe I could improve the accuracy somewhat. It's a 22, but the bore after the shotgun shell adapter is not nearly that large. Maybe .210 caliber. Right now it's just a cool novelty. I think I could push a lubed .215 rifling button down the barrel. I'm talking 5 thousandths of an inch! Tell me what you think. the barrel is thick, maybe 1/2 inch of steel in diameter.