Who makes best .375 LM?

Colt Canada LLC. is making a weapon system that is outshooting any that we own in extreme long range accuracy. It's beating the .408 CT, .416 and .50 BMG American's are currently producing. This is a fact. The proof is all in the math shooting the 350 Gn. rounds. I am aware that there are some new companies starting to build some .375's like Rock and Broughten. The question is if anyone knows a builder who makes a better rifle than the Canadians do...