I've had this shotgun for about 2 years now. I have only fired Sellier & Beloit 2.75: oo buck and remington slugger loads through it. Ever since I've had it, every 3rd round or so stovepipes or FTE altogether. I have tried, repeatedly, detailed cleanings. Same result. I have the old red and blue gas cylinders. I am using the one for heavy loads. Also, I have a 'breacher' choke installed. Y'all's thoughts on the failures?