Cheyenne Ranger, 48747L Posted December 9, 2019 Share Posted December 9, 2019 brother has pair of Uberti 72 Open Tops both will have cylinder jam up after first shot--he usually can use off hand to help turn cylinder while cocking it but sometimes even this won't work. has almost no play in cylinder and frame as well as cylinder and back of barrel. 200 gr RNFP, Red Dot, various brands of primers done this from beginning starts off right from first stage with problem ideas to fix this problem? home gunsmithing? gunsmith? thanks cheyenne Link to comment Share on other sites More sharing options...
Colorado Coffinmaker Posted December 9, 2019 Share Posted December 9, 2019 Your brothers guns are Uberti built Open Top design. The Barrel to Arbor fit is BAD!! The Arbor is too short which allows the barrel to wedge back against the cylinder face and jam the gun. This also makes the End Shake wrong. The first thing to try, before heading out to a gunsmith is to drop by the local hardware, pick ups package of # 10 Stainless Split washers. Drop one down the bore in the barrel and then seat the arbor with the wedge. The gun should tighten up just fine with proper barrel gap and End Shake. There are other, more complex (Expensive) ways to fix the problem, but the washer is quick and cheap. About 3 cents per gun. You may have to re-fit the wedge. Link to comment Share on other sites More sharing options...
Abilene, SASS # 27489 Posted December 9, 2019 Share Posted December 9, 2019 For the short term, try backing out the wedge some. Does the cylinder turn fine at half cock? Make sure you aren't piercing primers, although sharp firing pins haven't been a problem for quite some time. Link to comment Share on other sites More sharing options...
Still hand Bill Posted December 9, 2019 Share Posted December 9, 2019 There is an article out there on how to slick up the open tops although the links I had saved no longer work It covers how to fix the arbor fit. On mine, I had to add quite a bit to fit right. I tapped the arbor 6-32 and then added a screw with shims to get the right fit. A very common issue. Link to comment Share on other sites More sharing options...
Jackaroo, # 29989 Posted December 9, 2019 Share Posted December 9, 2019 Give Boomstick a call in Leonard, he did mine,...reeealll sweet. Link to comment Share on other sites More sharing options...
Springfield Slim SASS #24733 Posted December 9, 2019 Share Posted December 9, 2019 How does dropping a washer down the bore of the barrel help? Does is just shoot out with the next bullet? Seems dangerous to me. I have 5 Opentops and none of them have this problem, but then I don't pound my wedges in that tight. Link to comment Share on other sites More sharing options...
Three Foot Johnson Posted December 9, 2019 Share Posted December 9, 2019 How does dropping a washer down the bore of the barrel help? Does is just shoot out with the next bullet? Seems dangerous to me. I have 5 Opentops and none of them have this problem, but then I don't pound my wedges in that tight. Down the arbor bore in the barrel. Well, under the barrel, really. He worded it kind of odd. Link to comment Share on other sites More sharing options...
Hoss Posted December 9, 2019 Share Posted December 9, 2019 I stuffed tin foil in my harbor hole. The “elegant” fix is to drill a hole in end of the cylinder pin, put in a brass Dillon locator pin, then grind the pin down to the correct fit. I’m way too lazy for that! open tops are handsome guns, just a lot of work to keep them shooting well. Link to comment Share on other sites More sharing options...
Bailey Creek,5759 Posted December 9, 2019 Share Posted December 9, 2019 I had mine locking up, The firing pins were pointed, and poking holes in the primers. Replaced firing pins . Link to comment Share on other sites More sharing options...
Springfield Slim SASS #24733 Posted December 9, 2019 Share Posted December 9, 2019 I knew what he meant, was just being a smarty. Others might not be as gun savvy and do something dangerous. OT get a lot of bad press, but all I have done is replace the firing pins on one and have left the others alone. They are a bit finicky, and are not good guns for people who are rough on their guns. They are not Rugers. I love mine, and feel they are the best choice for shooting BP Duelist. Other categories, maybe not so good. Link to comment Share on other sites More sharing options...
Jailhouse Jim, SASS #13104 Posted December 9, 2019 Share Posted December 9, 2019 Open tops have a cool factor most of the others do not so would be worth a glitch now and then. Fix your arbor length and you'll be fine. Link to comment Share on other sites More sharing options...
Smokey Dave Posted December 9, 2019 Share Posted December 9, 2019 As others have said, the arbors are short. I fix all my Uberti guns with a steel spacer, soldered to the end of the arbor. Dress it with a file until the barrel fit is perfect. Now I can knock the wedge in tight, and the cylinder clearance never changes. I prefer steel over brass, because brass is softer than steel and can change over time. If for some reason, you ever need to remove the spacer, it's a simple matter of applying a little heat and it falls off. No permanent alterations to the gun. Link to comment Share on other sites More sharing options...
Cheyenne Ranger, 48747L Posted December 9, 2019 Author Share Posted December 9, 2019 thanks for the replies especially the picture Smokey Dave we'll get working on them this weekend. we'll just look at them as a 99% kit that's almost finished and go ahead and fine tune them Link to comment Share on other sites More sharing options...
El Hombre Sin Nombre Posted December 9, 2019 Share Posted December 9, 2019 What everybody else has said about the arbor. Once you get that fixed, everything works great. They are some of the most fun guns to shoot, that point incredibly well, and win most style points. Recently I acquired a really nice pair and had the same issue. I dropped a a small brass washer down the arbor hole (not the bore) and they work fine. A temporary fix until I can affix a permanent solution, but it will at least let you know if that is the only issue you are having. Link to comment Share on other sites More sharing options...
45 Dragoon Posted December 9, 2019 Share Posted December 9, 2019 Correct, "they are not Rugers" but, they can be made to be as tough, fast and reliable as the fastest Rugers !! They have just as much ability to be in the "winner's circle" as any Ruger . . . . and I am a fan of Rugers!!! It's not a slap at Ruger, more a "pat on the back" that Ruger is the "mark" everyone wants their revolver to meet!!! It is possible . . . Mike Link to comment Share on other sites More sharing options...
Doc Flimshaw Sass# 73310 Posted December 9, 2019 Share Posted December 9, 2019 On my richards mason conversions (essentially the same as open tops) I simply don't drive the wedge in as far as it will go. You can actually see how close it's getting. It's not the best way to fix it but on mine it works. It's a very well known issue Link to comment Share on other sites More sharing options...
Cheyenne Ranger, 48747L Posted December 15, 2019 Author Share Posted December 15, 2019 We did the washer thing and so this wouldn't be a true scientific experiment also rounded the loading gate where it it was coming in contact with the rims of the cartridges Guns work like a charm. nary a hiccup over 50 rounds . . . even if we don't know if it was the rounding off or the washer THANKS TO ALL WHO TOOK THE TIME TO OFFER SOLUTIONS Link to comment Share on other sites More sharing options...
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