Originally Posted by roninflag
My gunsmith merges them. Criterion is a less expensive Krieger( cut rifling) . there are reports that some of the 40x rem had harts installed on them .
Back before very many barrel makers knew how to cut a stainless barrel hart made most of the good ones.
When Remington came out with the 7mm rem mag they had trouble with the barrel throats eroding and found that if they used stainless barrel life was improved. The problem was they couldn't make a quality stainless barrel so the commissioned Hart to make the stainless barrels for them.
If you look on the barrel there will be a Hart shaped proof mark in with all of the other proof marks. Remington said this mark was just a proof mark (What ever) Hart did this just to protect themselves.
The custom shop used a lot of the hart barrels until Remington finally learned how to make stainless barrels. At one time all 40x rifles were made in the custom shop.
J E CUSTOM