I have a Cooey model 75 that someone did a Bubba Butcher job of scope mounting that l want to fix. I'm not concerned of the cost. I want to repair it if possible. I think a good tig welder should be able to fill the screw holes without doing any damage. l doubt the weld would go through to the other side and thought l might be able to fill the inside of the holes with JB weld. Is there a better way, maybe Silver Solder ? What do you think ? Thanks
Tig welding a 22 Cooley receiver
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The best way to fill screw holes is to drill out the threads, then drop in a appropriate size threaded plug long enough to stick slightly over the surface. Heat the plug cherry red with a tig (avoiding heating the surrounding metal). Then quickly pean the plug with a hammer, flattening it as much as possible. File off the excess and blue. This method puts much less heat into the receiver, and blues nicely.
Yes, screw a mild steel bolt or screw into the hole. Cut off slightly above the reciever; maybe 1/32 or a bit less. Do a quick fusion weld with no fill rod (the slightly protruding screw will provide the filler) refinish the exterior with a file then polish and blue; as triaq said, finish the inside wit a chamber reamer.
For a decent cosmetic repair without welding, counterbore the threaded hole slightly, install the threaded plug with a bit of protrusion, rivet, dress smooth and touch up with cold blue. The point of counterboring is to remove any trace of the threads at the surface. Rivetting will fill the hole more thoroughly.
Post #8 does the job but sometimes you may see a fine 'thread' line.
Post #2 will as well but I don't use a threaded plug... the threads really have no purpose, use a snug fitting rod drive it in and peen it over. No heat required.
You can also put a plug in the hole and MIG a blob. That quick heat is no problem and MIG filed and polished blues very nicely.
Post #2 will as well but I don't use a threaded plug... the threads really have no purpose, use a snug fitting rod drive it in and peen it over. No heat required.
You can also put a plug in the hole and MIG a blob. That quick heat is no problem and MIG filed and polished blues very nicely.
Great ideas guys. I think I'll degrease everything and use the scope screws that are in there ñow and spot weld with my mig welder. My eyes arn't very good anymore but I'll give it a try. I wish there was a easy cosmetic fix for the inside of the reciver. Thanks for all the replies
Here is a photo of a Winchester Model 61 receiver in which bubba drilled a couple of large holes in an attempt to mount some sort of scope mount. Plugged, riveted, cleaned up, locally polished and cold blued. The rifle itself is far from pristine, having been used in the Western Arctic. The rearmost hole can be detected, the forward one less so.
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i pluged a marlin 27 that had two holes drilled for a scope. i used an mill to true the holes . then turned a taperd plug .drove it in filed it . the rifle finish was brown so i used marklee browning . you can nut see anything ..my grandson has 19 year old eyes. he says he can see i spot thats shiny but only cause i showed him where it is .
