They are essentially a 12 gauge. Anything you would use in a 12 should be ok. I had one of the Indian ones, but looked it over and sent it back; I didn't trust it. Ordered one from Pecatonica, put it together, proofed it with 200 gr FF + 2 oz. of 7 1/2shot. No problems. I have shot 'Buck and Ball' just to see the mess it makes. I shoot (at) clays occasionally, mostly to get the fun out of hitting the odd one, which sometimes gets a round of applause from spectators. I shoot a 12 gauge ball over 80 gr FF, can stay in a 2 ft target at 25 yds, but I wouldn't call it a tight grouper. Mostly I use it for salute firing; with 150 gr packed in, it makes a ferocious roar.