The S&W I have doesn't have many issues with the bulk ammo. There will be an occasional weak round that almost sounds suppressed and usually results in a short stroke.
Some of the early guns had more issues that the current rev. "D" prefix serial number and the Blue action spring is the most recent rev. I think if you have an earlier one, S&W will upgrade your gun for free.
When I am getting close to 500 rounds without cleaning I will start to get an occasional missfeed but it clears right up with a malfunction clearance and a quick squirt of CLP or something. I usually take it down and clean it after it starts doing that. It shotguns open just like a real AR and is a breeze to clean.
I have fired it with Remington Goldens, Federal Bulk and Winchester 333. I had the best results with the Federal.
I haven't tried it with any "good" .22 ammo.
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