I have an 1100 Competition Master, which is very similar. Picked it up early in 2004. I use the Viton rings, and replace it every cleaning. They were so cheap, why not? I shot it in 3-gun several years. I learned to bring a spare trigger group, and the spare saved a match once.
It cycles Fiocchi aero low recoil slugs, which are 1oz @ 1150 fps, but had trouble cycling Remington Managed Recoil slugs, 1oz @ 1200. I guess different gas characteristics.
Oh, do not EVER run your finger inside where the bolt slides. Those sharp edges will draw blood and you will be cleaning a mess from inside the receiver before you know it.
Have fun.