10MM Chamber Support: Colt, Ruger, Para, Kimber, Springfield, Sig Sauer, STI

After making the first video of 10MM chamber support (https://www.youtube.com/watch?v=F2AN5v7AjyI), there were a lot of questions and requests for additional pistols included. After two years unfortunately I was able borrow a few pistols to fulfill the request. Your requests do not fall on deaf ears and I do try to answer all of the questions.

I want to thank all of my friends for loaning me these pistols to do this evaluation. Though I might be getting the short end of the stick as I do return all pistols cleaned no matter if I fired them or not.

By the way, you are going to want to stick around to the very end, probably the least expected winner and ending!!!!!!

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You forgot the Smith & Wesson 610 which has excellent support! LOL


Very informative. You bring up a really important part of this bulge situation and that is case head thickness. If you measure a 9mm case, the floor of the case is well within the the chamber, even when relieved for a feed ramp. By comparison, if you measure 40 S&W case the floor is much lower so the case side wall ends up in the unsupported area instead of all being completely inside the chamber. (I assume the 10MM is similar) To me the primary flaw is in the cartridge design and not the firearms, the firearms minor differences exaggerate… Read more »