Hi all. Haven't been on this forum for years now. Here is my question:
If I am going to make a barrel insert on a lathe, what sort of steel should be acceptable, do I look at Rockwell hardness only, or are there other factors??
I am looking at three calibers: 9x17mm (.380), .32 ACP and .22 LR. Nothing particularly demanding, but still I want to do it right. I don't want to put any extra stress on the existing bore, or I want to minimize it, so the insert should be able to contain the pressure of the cartridge in its own right. Bore diameter is about 0.45 in.
What Rockwell hardness is required for a a barrel/barrel insert, or a cartridge adapter?
Thanks