I am extremely pleased pleased with a custom contoured barrel I had McGowen make for me. It is unbelievably accurate, was delivered to me very quickly, and most important of all they matched the original barrel perfectly. This was critical, because for the British sight island to remain valid the front and rear sights had to be replaced in exactly the same registration. I was amazed to find with 2 different loads no sight filing was required.
I should also add that this was done for a very reasonable price.