I own one and love it. I bought an early 5xx serial number one and have had zero issues with it with about 500 rounds through it. This rifle is a game changer. Full power and short and handy.
I have a Socom and National Match M1A for reliability and am testing this for curiosity sakes. So far, I love it.
Have not handloaded for it yet but it does consistent 1.5" groups with Federal premiums in 165 grain bullets.
There is a lot of bad press on them, but I have zero FTF's or any other issues with it. Just like my M1A's.
The big thing about them is that they handle like a fine over and under shotgun, shoot a high power round, and are accurate.
I take clients out shooting a lot and this is the most wanted one to shoot out of all of them.
Fun, fun, fun.