2 quick things:
-I wouldn't worry about the suitability of your action for potential PRS-type stuff as you'd just never run a 300NM for PRS (and depending on the match you might not be able to, it's just too much energy on the closer steel)
-Hit up Insite for your barrel as their "pet" contour for 300NM (and the one I have) is a hybrid of a MTU and heavy varmint.
-I wouldn't worry about the suitability of your action for potential PRS-type stuff as you'd just never run a 300NM for PRS (and depending on the match you might not be able to, it's just too much energy on the closer steel)
-Hit up Insite for your barrel as their "pet" contour for 300NM (and the one I have) is a hybrid of a MTU and heavy varmint.