X bolts fit me perfectly, I love the action, the safety and the accuracy. I don’t have a pro though, just a hells canyon speed and a micro composite, they are both acceptably accurate for me (3/4” 5 shot groups at 100 yards, handloads). The pro is almost $1000 more, you get a cerakoted stainless action / barrel (redundant? Corrosion protection on a corrosion resistant material??), a lapped barrel and a carbon fibre stock. Worth $1000, not for me, but maybe for others. I’d be curious if / how much more accurate that lapped barrel would be.
Let us know how it does if you end up with one