“I buy these for the sole purpose of running them in semi-automatic 410 Bore shotguns, primarily for AR-15 conversions. If you are looking for a "short" 2-1/2" shell for Taurus Judges with 2-1/2" chamber, or for AR-15 .410, this is the best I have found, and I test all 410 on the market in these firearms. (note: 410 AR-magazines require a slightly shorter shell than average to fit through a standard lower receiver, and this is the correct length for that application.)”