Well, I've shot a few different ones. Mostly have been with hevi 13 7s and nitro h51013a 4,5,7. The hevi 13 7s have consistently given 300+ in a 10" circle at 40 and around 540+ in the 20". The nitros have varied some but always deliver great consistent killing patterns. Those were shot with a matched Sumtoy choke. It also did well with the nitro 517 loads through a rhino choke. The star dot and hevi 13 7s was also a super combo.
I will be setting it up tomorrow at the Sumtoy shop. Going with the 7s and later when the nitros arrive I will try them as well as the old federal fc 6s. I have really high hopes on the lead loads....
I will be reporting in on results with my gun soon, post yours too