In an off-list email, ktwm told me that I could take the bolt apart if I wanted to but be sure to Loctite the screws again when reassembling it. I assume that advice would apply equally to you as it does to me, and hopefully ktwm wouldn't mind me posting his comment in a public venue.
I haven't disassembled the bolt on my SU-22, but looking at the exploded diagram it doesn't look too bad. There are a couple of springs, strangely labeled as 384 FRONT SIGHT DETENT PIN SPRING. Otherwise, it looks like a left and right bolt half held together by two screws, a firing pin, and extractor and an extractor axis.
I've read that it's possible to have a slight misalignment between the two bolt halves. Not sure, but that might be something to check?
If you are inclined to tear into it and start messing around with it, you might try polishing the Feed Ramp, part number 704 in the exploded diagram.
I've shot cheap Federal bulk pack (maroon box) from Mal*Wart and it shoots well. Maybe three per box of 525, I have a round with no primer at all. I've tried cheap Remington Golden Bullets, also from Mal*Wart. They jam very consistently. I think it's the roll crimp that captures the bullet but allows it to rotate and bend a bit to make banana shaped rounds. I was at Sportsman's Warehouse the night before last and I bought some inexpensive Blazer bulk pack and some fairly inexpensive Federal Champion (light blue box), both in 525 round bulk packed boxes. The Blazer ($14) was cheaper than any of the Mal*Wart ammo, and the Federal Champion ($18) was a few dollars more than the two bulk pack ammo boxes from Mal*Wart. I'm going to try them in the SU-22 and post the results. Both look good, at least from a casual inspection.