I went to the range this morning (this time at 0900 hours with some sleep) with both barrels.
These two targets were shot from 35 yards at rest (because I was too lazy to drag the bench to the 25 yard line)
Factory barrel:
Wilson barrel:
It was interesting to see the difference in point of impact when nothing but the barrel was changed. As you can see the factory barrel shot slightly to the left. Granted, this isn't scientific. I didn't use a ransom rest, just shot off a bench supported by a shooting bag.
So now to see what this thing could really do. I backed it up to 65 yards and used my truck as support. Here's the group that it turned out:
In my opinion the WC barrel is worth the money and shows a noticeable improvement.
So if you're curious about how the gun is setup:
Glock 17 Gen3 (SN: MXX _ _ _)
Glock "Dot" Connector
Sevigny Carry Rear (plain) / Tritium dot front
Vickers mag catch
I've now put around 500 rounds through the gun setup like this. I like it a lot.