pokute
Active Member
Yep. That's what all the forcing cones I've seen on new guns look like. Pathetic. Seen it in S&W's and Rugers.
Will only buy 3-screws and -2's these days.
Revolver leading
- Thread starter Brad
- Start date
Yep. That's what all the forcing cones I've seen on new guns look like. Pathetic. Seen it in S&W's and Rugers.
Will only buy 3-screws and -2's these days.
Pistolero
Well-Known Member
Throat sizes and forcing cone symmetry and smoothness, plus possible thread restriction are the issues to sort out in
a revolver. Not so hard to fix. Now that Ian has a lathe, he can fix S&W bbls with thread restrictions, too.
Have you checked for a thread restriction, Brad? Best way I have found is to get out your gauge pins.
Find the largest one which will go into the muzzle. If it falls through all the way, you are good. If it
makes a nice "clink" when if falls and hits the area just at the frame....you have a restriction. Usually
about 0.0015, IME. Remove bbl, take about .001 off the rear shoulder and reinstall bbl with blue
locktite. Sometimes it needs a bit more off of the shoulder to clock right with no significant torque.
Locktite holds just fine, too.
Bill
a revolver. Not so hard to fix. Now that Ian has a lathe, he can fix S&W bbls with thread restrictions, too.
Have you checked for a thread restriction, Brad? Best way I have found is to get out your gauge pins.
Find the largest one which will go into the muzzle. If it falls through all the way, you are good. If it
makes a nice "clink" when if falls and hits the area just at the frame....you have a restriction. Usually
about 0.0015, IME. Remove bbl, take about .001 off the rear shoulder and reinstall bbl with blue
locktite. Sometimes it needs a bit more off of the shoulder to clock right with no significant torque.
Locktite holds just fine, too.
Bill
Last edited:
pokute
Active Member
Funny how we are all accustomed to seeing different things. Every "thread restriction" that I've seen was lead just front of the forcing cone. Never actually seen a real thread restriction. Just scrub a little harder and the plug gage falls right through.
On the other hand, people ignoring the pics posted of the very bad forcing cone are making me wonder...
On the other hand, people ignoring the pics posted of the very bad forcing cone are making me wonder...
pokute
Active Member
Must be all that time off and now back to work.
And the burning of the LASC range, and divorce, and having to sell my house... Wife's criminal hearing for defying restraining order 3 times is tomorrow.
Pistolero
Well-Known Member
You've been lucky. I can assure you that I have removed it from several S&Wsby resetting barrel
and a S&W gunsmith friend has done literally dozens. Factory thread restriction is real.
Sorry to hear of your problems. Hope things will look up in the new year. Best wishes, sir.
Bill
and a S&W gunsmith friend has done literally dozens. Factory thread restriction is real.
Sorry to hear of your problems. Hope things will look up in the new year. Best wishes, sir.
Bill
pokute
Active Member
Well, in spite of never seeing it, I'm willing to concede that it is a likely occurrence simply because it's consistent with the way metal behaves. It's only whether it happens to the extent that it is significant that I question, never having seen it. It's probable that if I had handled more S&W and Colt .45 revolvers (where most of my experience at .45 is with FA's), I would have seen it. I think it's highly unlikely in a beefy .357 bored barrel.
I have seen old .45 revolvers where the barrel has been re-tightened crazily, and the guns shot very poorly. I am fortunate to have had a shooting partner with nearly 200 old guns that I had the leisure to inspect over several years.
Something that Elric has I think not yet reported on is a study done about a hundred years ago reporting on the fictional quality of star gaging and the all but universal existence of a bore constriction under the front sight of the Springfield rifle.
I have seen old .45 revolvers where the barrel has been re-tightened crazily, and the guns shot very poorly. I am fortunate to have had a shooting partner with nearly 200 old guns that I had the leisure to inspect over several years.
Something that Elric has I think not yet reported on is a study done about a hundred years ago reporting on the fictional quality of star gaging and the all but universal existence of a bore constriction under the front sight of the Springfield rifle.
pokute
Active Member
Hey, at least your having fun.
I'm having something. Something less than fun. Fitful sleep. I hear weird voices at night that sound like they're in the crawlspace of the house (fortunately not saying anything intelligible - Probably cats, skunks, and coons), and see menacing shadows in the shrubbery - Probably just a breeze. 7 months now since I filed for divorce, and not one bit of forward progress.
Sorry for whining and being a downer. I can't wait to come out the other side of this. A pathetic way to drift off topic.
pokute
Active Member
Want a lap warmer get a 60 pound coon dog.
Got a 60 pound pitbull. She's a hoot! If she doesn't want me to get up in the morning, well, I better have a decent bribe prepared.
Ian
Notorious member
That's funny! I'm glad you're willing to "concede" about the existence of thread choke.
A .357 is just as bad as any other because the barrel tenon is proportionally as small as any other caliber. I have two .38-cal Smiths with some of the worst barrel choke of any I've seen.
Ruger revolvers made in the past 20-30 years are especially bad due to the timing process of the barrels. Read up on how Ruger sorts and times their barrels (probably have to buy a book, not sure what's published on the net about it), it's enough to make any machinist cringe.