I had much better luck with the 95grainers...This is a handload with Reloader 22...and it was as fast as I could load & fire...It's the second group in a group of 5 that I managed in less than 3 minutes...2 holes in the bottom..then the 3 at the top..

I would say you'll have good luck with the factory ammo in it...The Supreme line has always been a benchmark load for me...Don't have sticker shock when you go to buy it though...it has gone up dramatically over the past year... The picture Quick posted was with the factory offering of the 55 grainers..
I've talked myself into getting another barrel this month..and I hope it shoots as good as that one did...
Mac