My experiences are exactly the same as Volkov...one drill bit too big for the hole, and it runs 9/10 rounds just fine on the lighter loads. Buck shot cycles fine, but it still isn't throwing the brass very far...3-5 feet max. On the light loads, you can see the shells falling 2-3 feet away, just barely getting kicked out of the gun.
I'm going to have to go up 1 more size too. Given how it really doesn't make a huge difference to go up just one size, I'd go 2 sizes right away if I had it to do over again. Then again, it was easy enough that it isn't a problem to redo it. I just don't w