Thank for the compliment. but I have ben using it for years. I have a shot gun shell like chamber I use a shot gun for fire forming. using a 22 case. LarryProbably because they paid attention to my post on it. Thanks for the plug. It's slightly more accurate if you use a 22 WMR case and square off the rim as I did. (See photos above.) The 22 LR case works best for 22-cal chambers.