Hello. I had a friend of mine in the aircraft industry weld a match recoil lug to a Savage varmint receiver along with closing in the top with a piece of stainless now it looks like a LRP receiver but with small shank threads. I have fired 40 rounds of 185grn Fusion ammo through it and everything seems to be ok. Do I need to have the receiver heat treated.? My friend said I do not have to. My next project is to have the lug welded and a one piece scope mount welded to the receiver. What say you folks.