Long,
I don't know what performance others will get but her's how mine performed before and after.
Before I sent mine it was grouping .59" and it went down to .38" at 100 yds. At 300 yds, It went from about a 5" group to around a 3" group which I'm really happy with.
The reason I ended up putting the McMillan on was I was pillar bedding the one I owned and my buddies drill press chuck fell off into the stock! The thing flew all over cutting the heck out of the stock and my hand (took months to heal).
Anyway, I just replaced the trigger springs with the timney kit and I think that'll make a group difference too.
Spot
