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  #1  
Old 11-18-2007, 08:55 PM
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Location: Lexington, Kentucky
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Drill & Tap TC Barrel


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I have one of these peep sights installed on a TC Omega (https://www.eabco.com/cgi-bin/shoppe...on&key=127-812), and looking to install the same on a TC Greyhawk. However the back of the Greyhawk barrel is not drilled/tapped.

TC's website and manuals say not to drill holes in their barrels as it might weaken the barrel and lead to rupture. Is this really an issue? Glock says not to shoot lead, most manufacturers say not to shoot handloads, and my pillows all say not to remove the tag...

Obviously you don't want the holes any bigger or deeper than necessary. I would duplicate what was done on the Omega. Any insight?

Thanks!
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  #2  
Old 11-19-2007, 06:58 AM
Native Webfoot's Avatar
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Join Date: Nov 2007
Location: Cascade Foothills
Posts: 36
Drilling and tapping a Greyhawk barrel will not cause it to rupture anymore than drilling and tapping a .458 Winchester barrel, if done properly.

This is a litigation disclaimer solely for our age of the law suit. The only ruptured ML barrel I have ever seen had been loaded with smokeless powder. Black powder pressure curves can't even come close to what happened with it, when it was touched off.

I worked in a black powder specialty shop for 3 years. I saw things that would make you lose faith in the human race, but never a barrel rupture with BP.

T/C sights are mounted with screws. They drill and tap the barrels to mount them. So , I don't think there would be a problem as long as common sense prevails, and the holes are only drilled as deep as necessary, no deeper.

Last edited by Native Webfoot; 11-19-2007 at 07:03 AM.
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  #3  
Old 12-12-2007, 11:00 AM
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Join Date: Jan 2007
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Quote:
Originally Posted by KY Gungeek View Post
I have one of these peep sights installed on a TC Omega (https://www.eabco.com/cgi-bin/shoppe...on&key=127-812), and looking to install the same on a TC Greyhawk. However the back of the Greyhawk barrel is not drilled/tapped.

TC's website and manuals say not to drill holes in their barrels as it might weaken the barrel and lead to rupture. Is this really an issue? Glock says not to shoot lead, most manufacturers say not to shoot handloads, and my pillows all say not to remove the tag...

Obviously you don't want the holes any bigger or deeper than necessary. I would duplicate what was done on the Omega. Any insight?

Thanks!
First off wanted to say welcome to the forum and thanks for posting.

The second thing is you've given me an idea for a project I'm working on.

See link...http://www.shootersforum.com/showthread.htm?t=42846

Although it's not a bolt-on solution for my inline bolt action rifle, it something I can try.

Thanks
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Old 12-12-2007, 12:49 PM
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Location: Peck, Idaho
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Welcome to the forum Gungeek. Rules are simple, be nice and join in. I've drilled and tapped lots of barrels and actions for scopes over the years and never had a problem. Now I've seen home grown jobs that pretty well summed up what Monty said. Scope mounting screw holes are not drilled very deep and you need a bottoming tap to finish them out so you have good threads all the way to the bottom of the hole. If the rifle is high recoiling then it's wise to go to the 8 by 40 threads rather than the standard 6 by 48.

If your not sure exactly what your doing or need to drill both the front and back of the barrel/barreled action for sights and don't have a sight drilling jig and the proper drills and taps then get a smith with the right equipment to do it for you. It's not really expensive.

I've seen folks drill holes all the way into the chamber, break taps off in the holes, drill off center holes, use the wrong size drills for the tap and more, then gripe at me for wrecking their own gun when there wasn't an easy fix. You should see some of the home grown porting folks have tried to do with a drill press and a $9.95 set of inexpensive drills.
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Old 12-13-2007, 08:34 PM
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I've seen black powder rifles with clean out holes drilled into the chamber and a short screw plugging it up.

Your TC you have a lot of room to put two screws (usually 1/2 inch apart) into it rear of the chamber into the threaded tang without hurting a thing. I would think a top mounted peep for a 700 rem would be about the right size in dia. They do make a tang peep for the Renegade and Hawken that should go on a Greyhawk.
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