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I'll answer some of your questions,
1) I belive it is both, with the 22M cylinder installed it shoots .22M Ammo, with the 22LR cylinder installes it shoots 22LR. All of these "convertable" revolvers that I have seen used the same barrel even though there is a slight difference in the bullet diameter of the 2 cartridges. As I recall, it is "barreled" for the 22LR ammo and the accuracy of the 22Mag suffers. It appears that you have the 22M cylinder.
2) I am not sure here, see answer 1).
3) No, it's just missing in your pistol.
4) Not my expertise.
1) Agree. (Except the Magnum bullet is larger in diameter than the Long Rifle bullet and the barrel is bored for the tough, jacketed Magnum bullet; the soft lead LR bullet upsets or "slugs up" to the larger bore pretty well. But accuracy for the LR is compromised a bit.)
2) As to the differently-listed barrels, I doubt if they are any different. The two different listings are probably a stocking procedure to ensure that when the customer says the revolver is in .22 LR or .22 Mag (either is correct for these) and the clerical person filling the order isn't knowledgeable about the intricacies of the issue, the customer's order gets filled O.K. Of course, the cylinders are chambered differently for the two cartridges.
4) Not my expertise either. You need to contact this forum's host (you are on a public discussion forum, not Numrich/Gun Parts Corp.'s business page) via http://www.gunpartscorp.com/ContactUs.aspx
I have a Hawes Firearms Co. Los Angels, California Germany #73xxx all of this info on left side of barrel
On right side of barrel is Weatern Sixshooter .22 caliber magum
This pistol came with a six shot .22 caliber cylinder no markings on cylinder; the .22magum caliber cylinder is marked with a 'M' on the breech face.
The .22 cailber camber measures .0224"; the .22magum caliber chamber measures .0236".
The pistol a more accurate shooting the .22magum because the barrel is a .22magum than shooting the .22 caliber.
The copies of the Colt SAA revolver as marketed by Hawes is a COPY...These are not clones of the Colt SAA. You can get takedown and repair instructions from the publications of Dave Chicoine(www.oldwestgunsmith.com) Titles are Gunsmithing Guns of the Old West and Antique Firearms Assembly/Disassembly and parts from www.vtigunparts.com >>>>>>>>>AND<<<<<<<<< FWIW I haven't examined your complaint in detail...BUT...this style of revolver does NOT use a conventional style ejector...under thee right side of the barrel at approx the 4-5 O'clock position is the ejector assembly..there is the Ejector Rod tube and mounting screw...the Ejector rod and Ejector spring Ejection is done by clock timing the cylinder to the loading gate..which is opened and each indivdual case...fired or unfired is pushed out to the rear......Many of the Hawes/JP Sauer SAA revolvers are desirable and usable by Cowboy Action Shooters and a pretty good aftermarket of upgrade parts is out there...You might want to consult the Tech Staff at www.brownells.com or..at least order their special catalog for these parts
There is one thing I though of; the cylinders are the same size in over-all dimension. The caliber is determined by the holes bored in the cylinder and the inserts installed for the caliber. If you look at the breech face, you will see this on this model of Hawes pistol. The ejector works with either caliber.
My measurment of the chambers should be --- .22 caliber 0.224" & .22 magnum 0.236"
Flipper, are you 100% positive that the cylinder you have is a factory match for the revolver frame you have? Cylinders should be fit/timed to the revolver frame correctly, and at the least checked by a gunsmith if the revolver/cylinder is unmarked, and with an unknown history to you. Taking a cylinder from one revolver and putting it in a different revolver frame of the same caliber and then attempting to fire it is, well like playing Russian Rullette. It may work perfect, or you may just pull the trigger on a hand grenade that's only at arms reach from your face and attached to your hand. I've also seen folks get burnt pretty good from just standing near someone shooting a revolver that's shaving lead. They weren't happy campers after the shots. Tis better to be safe, than sorry. Duffman.
Like Duffman said and..getting multiple (moving)holes to line up,precisely, with a fixed hole is well a feat of engineering genius..Truth is..if the propellents were available(Blackpowder doesn't lend itself to autoloader function) then there is no other reason that automatics wern't invented first..an autoloader is a very simple solution to multiple shot searches...revolvers can be a nightmare.....IMHO of course!!!!!