I've had 5 different Encore's and barrels in .22 Hornet through the .50 muzzleloader. All of them shot ok, with more than enough hunting accuracy. I wouldn't say that any of them were supreme tack-drivers, mostly in the 1.5" range or so. Like I said, plenty good enough for 99.9% of hunting. I used the over-size pins on one of the actions, and it did make a difference in accuracy. I think that it was the 1x pin that worked. On that frame, the factory pin fell out of the hole if the forearm wasn't on the gun, and there was a bit of lateral play. The 1x pin tightened it up perfectly. But that's just one gun. That's also before I learned that they void the factory warranty.
Honestly, the oversize pins are the last route I'd take. There are way too many barrel makers that produce extreme accuracy, and don't mention anything about the pins. There is only one guy (we all know who that is) that makes the pins and preaches about their benefits. If you read past posts on GB, you'll see that there are hardly any about the pins, most accuracy tricks involve the free floated forearm and the springs in the gun.
If the pins were the cure all that they are hyped to be, you'd see a lot more feedback recommending them.