"Types" of .22 Chambers?
Anyone have any references to dimensional drawings for the various types of .22 LR chambers, including the throat?
I remember reading once that there were "sporting" chambers, which the Ruger 10-22 and almost everything else uses (a bit "open" for feeding reliabilty), "match" chambers used in bolt-actions like the Winchester Model 52, and even some intermediate approach developed in the late 60s or mid-70s which by itself can significantly improve the accuracy of sporting guns...just set back the barrel 1/4-inch and rechamber.
Any clues?