Unless it's REALLY corroded, a .22 short chamber should not accept a .22 LR. Try one and save yourself a chamber cast. One problem with .22s originally chambered for .22 short is that when some uh, ah, "person" then rechambers them for .22 LR, they often don't shoot well because of a different twist.
So if you find that you do have a .22 LR chamber and it doesn't shoot LRs well, try shorts and longs in it. If it shoots THEM well, then you know that 'ol Bubs has been at work. But you won't care, because you'll still have a neat little rifle.
BTW, I personally wouldn't drill the back of an original Greener Martini for a cleaning rod. Just take it apart and clean it now and then. More .22s are wrecked by overcleaning than by overshooting. (We've had non-corrosive ammo for some time now, they tell me!).
Last edited by Mike A.; 04/16/12 11:22 PM.
