Know this is old and common practice to most here, but thought I'd post for anyone that hasn't seen it before. Had a hole to fill today, so took pictures.

To fill a hole in an action (or barrel), thread in a tight fitting screw (deform the threads slightly if needed, at the bottom end). Cut off 1/16" or so above the surface, and use a light hammer to peen and swell up the screw into the hole tightly, mushrooming over the metal to just proud of the surface. File off, and polish, and it will be nearly invisible when blued or color cased.

Rust blue will probably hide your filler screw but hot caustic blue or case color hardening will quite probably show it, in my experience.
I can also see where your hammering has altered the bevel on the front of the action. You can lightly file up the bevel to match.

I plug them with a screw and saw off the head, leaving 1/16 sticking out. TIG melt it.

The best Ive seen was driving a red hot pin it a bored out screw hole..hides best under a bright light, or sunshine done right. Not sure of the specifics just the results.

dpcd
Do you "weld" the screw to the action with the TIG or just use the arc to melt the screw flat to the receivers surface.

You weld the screw to the receiver, but it's not very deep with TIG. If you just melted the screw you would still have a pit. And that would be harder to do than just melting both together. TIG is like making a little puddle of pudding. Sort of.

Just as a sales plug, I make and sell threaded inserts, 6-48 and 8-40, 1018 and 4140.

Thread it in until it is flush with the bottom of the hole, cut the top off nearly flush, put a healthy chamfer on both the screw and the hole, run a root pass around, fill, file.

I found that using screws was problematic at times.

When our shop got a TIG last year a friend of mine came by to teach us how to weld with it. He had worked for Union Carbide and ESAB for many years as an instructor. He showed us how to fill pits by snipping a bit of steel wire and laying it in the pit. Then puddle it with the TIG torch.

quote:

Originally posted by dpcd:
You weld the screw to the receiver, but it's not very deep with TIG. If you just melted the screw you would still have a pit. And that would be harder to do than just melting both together. TIG is like making a little puddle of pudding. Sort of.

quote:

Originally posted by dpcd:
I plug them with a screw and saw off the head, leaving 1/16 sticking out. TIG melt it.

AND, that's the best way to avoid undercuts. A nice little pimple.

Just another way...I ream out the hole and drive in a taper pin...Like DCPD, leave about 1/16" above and tig.

No chance of crud from the threads migrating into the weld

If one does that on the front ring of a receiver does it need to be reheat treated.