bbl wont screw into action

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louism

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Had my BSA 30-06 rebarreled a few years back.
Now i decided to remove new bbl to sell and reinstall original 30-06 bbl.
Original bbl screws into action a few threads only then stops. Why? Any ideas?
Will be going to a smith but Im curious as to why it stops after a few spins.
 
Possibly the old barrel was hard to screw off to start with... so it would be just as hard to screw back on... but if it seems to 'stop' just as it engages a screw hole, those threads might be interfering... a Dremel tool with a thin cut off disc can fix that up quickly. Reaches the bottom of the action thread easily.
 
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No scope or screws on action.
I think you might be on to something about screw hole interference. Any way to fix that? I don't want to force screw bbl into action.
 
If a scope base screw hole has messed up the receiver threads, on a Mauser, I have a tap that I can chase the receiver threads, to clean them up. Your BSA 30-06 might one of those built off a 1917 Enfield? If so, those would be square threads, and I have never seen a tap for that. But they did not grow in there - there must have been a way to cut them in the first place. A small piece of mirror, glued to a 1/4" dowel and a good light might let you see if there is a burr sticking out at the suspect area... Possibly need a dab of lapping compound to work through that burr, if there is one??
 
'ears an eye-deer, oww bout comparing the two bawrill threaded stubs?
Do the threads match each t'uther?
Never know what the previous gunteck did to fit the new bawrill in the action.
 
Probably just a burr from the scope mount hole. One can clean that up easily enough. Like Dennis said, it might just be tight.
 
Or, to translate what Kamlooky said - hold the old barrel and the new barrel threads up to each other and see if they mesh/match. If they don't, perhaps the guy who put the "new" barrel on retapped the receiver. Hard to believe that because it would involve a lot of material removal, so it's more likely that there's a burr somewhere. What's the thread on the barrel look like? any dings? Last thread peened over? Something's interfering.
 
I think it is safe to say Kamlooky's scenario simply did not happen. The replacement barrel threads are simple a bit looser.
 
Leeper said:
I think it is safe to say Kamlooky's scenario simply did not happen. The replacement barrel threads are simple a bit looser.
Click to expand...


or to put it another way the original barrel threads are a bit tighter...

Many times I have had to use a wrench all the way with effort to remove a barrel. The threads were simply a tight fit... requiring a wrench to reinstall that same barrel. This is common with M98's and Browning's.

I think it is time we wait for the OP to post again...
 
sorry I was away for a bit. Looks like the bbls do mesh up.
Thanks everyone for replies. I will be sending it out bext week to smith if I can find someone in Montreal/Ontario region to reinstall.
Thank you for the replies.
 
Many, many years ago I had a Parker Hale (Santa Barbera/Mauser) action and bought a pre-fit barrel for it. The new barrel would not fit so I got a Mauser Tap (?) from Brownells. I could almost, but not quite, run the tap in with my hands. Once done the barrel installed, no problem.
 
I have one of those taps from Brownells - they cut with 60 degree profile threads. I also have the die that works with it. The original Mausers, and, I presume Santa Barbara, were actually 55 degree profile threads - both were same threads per inch, just slightly different shape to the thread itself. I've read most North American makers cut the threads to 60 degrees, so that tiny bit of difference probably doesn't really affect a sharp tap, but might explain why a pre-fit might not want to go easily, or why a gunmaker might cut his threads a smidgeon "looser" to easily turn onto the receiver.
 
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