Skribs said:
What are chamfered charging holes (to be clear, that's 2 questions: what are charging holes and what is chamfering), and what benefit do they provide?
See link for a photo of (aggressively) chamfered charge holes (post #2; see also my caution below). Chamfering helps speed up your reloads by making it easier to insert fresh rounds. In effect, you're adding a small funnel to the opening of the charge hole.
http://www.pirate4x4.com/forum/outdoor-sports-recreation/1965121-moon-clipping-gp100.html
ATLDave said:
IIUC, the "match" that the Match Champion was intended to make you champion of is IDPA in Stock Service Revolver division (as a 6-shot .357, it wouldn't be competitive in USPSA Rev).
That's been my impression as well - that it was offered in response to S&W's "SSR" version of their 686.
As a turn-key IDPA or general range revolver, the MC (or the SSR) wouldn't be a bad choice. The "tuning" is pretty conservative, though, and I find the light weight from the partial underlug makes it less forgiving gun for the shooter when things speed up, even when using non-magnum "gamer" loads. The supposed faster transitioning is much overrated, IMO. Ironically, it also makes it easier to
overrun the target, so at best, it's a wash.
If one were looking to buy a gun specifically for IDPA, I'd recommend buying the standard version, and spending the difference on some good tuning by a 'smith who knows what they're doing. Whether for competition or general range shooting, you're likely to get a better shooter going this route. Again, though, if you want to avoid the hassle of having it tuned, the MC or SSR variants aren't bad choices.
ATLDave said:
Chamferring of chambers may make the gun less forgiving of short-stroke or horizontal ejection.
An important point to be made about chamfering: Unless it's going to be a dedicated moonclip gun,
don't chamfer the ejector! Only chamfer the cylinder holes themselves! Chamfering the
entire charge hole (e.g. the ejector) is what leads to badness during a reload with loose cases (i.e. non-moonclipped gun). At most, only the sharp edge of the ejector might be taken off. When done correctly, chamfering itself shouldn't increase the chance of cases getting hung up.