Personally, I would not consider a soldered lug unsafe but would not want to try hot rodding it. Many barrels had soldered lugs in the past and saw years of use, although a few occasionally lost their lugs. I am capable of replacing a lug but a person who is not might not want to spend the money to have a professional do the work.
The easiest fix is to make a custom lug with greater barrel contact area and silver solder it to the barrel. Other options are dovetailing or screwing a lug onto the barrel if it is thick enough or making a barrel band lug. Any of these fixes will require stock work to make the forearm work with the new lug.
Using factory spec 30-40 ammo, the OP would have a good 200 yard deer, elk, moose or bear gun.
ADDED: I was thinking forearm lug. Still would consider it safe but a couple of tig tacks on each side of the lug might increase its strength but could easily destroy the barrel if too much heat is input.
2120-September 1, 1945
To: D A MacArthur /C H Nimitz
From: H S Truman
Political Correctness is a doctrine, recently fostered by a delusional , illogical minority and promoted by a sick mainstream media, which holds forth the proposition that it is entirely possible to pick up a piece of cr*p by the clean end!
Now, with special thanks to the Truman Museum and Harry himself, you and I finally have a full understanding of what "POLITICAL CORRECTNESS" really means.....
Last edited by ulav8r; 07-10-2019 at 09:39 PM.
Reason: Clarified original post thinking.