Today I went with a friend to Lehigh Valley Sporting Clays and shot a round of 100. By halfway through the gun was opening up quite a bit more easily.
The gun had no misfires with Federal and Winchester 12 gauge No.8 target loads. I did have some sticky extraction in the bottom barrel but only with the Winchesters. Both my friend and I have had problems with this ammo in the past, he in a Browning O/U, so as far as I'm concerned this is an ammo issue, not a gun issue.
I'm very happy with the Baikal MP-310. Only time will tell how durable it is, but for the occasional clays or trap shooter or hunter, it looks to be a good value. The one thing I plan to change now is get a set of extended IC choke tubes for it from Carlson's.