Aero SOLUS is a good option as well (I have Zermatt actions too, just offering another option). I got my first one just to try because of the price. Put a 6CM Proof on it and it shot great. Later I stumbled on one here when I decided I wanted to build a dasher/br/gt. It was the later version with the fluted bolt. It popped up for a great price so I bought it and called Ray at Zermatt and switched my order from another origin to a rim x.
The reason I bring it up, I put another proof barrel in 6 dasher on the second origin action. It shot lights out, never had an issue with it. One in a KRG bravo with all the weights you can get, the other in a MDT ACC premier. Identical LOP. Well I swapped glass on both the 6mm last week. Both scopes in Warne Skyline Pro mounts. The POI movement from on rifle to another was .1mil low going to the dasher, .1 high going to the CM. That literally could be the difference in the velocities I load them at as I run my dasher pretty slow. Zero windage shift.
In my opinion, you can’t beat tolerances like that. If you can find one of them sitting on GB or red hawk or somewhere, that action is worth every penny.