I have the same barrel on one of my Mossy 500's and I tried the new Remington premier Accutips this year. It seems to like them alright. but it like the new Winchesters better. I can't remember the name but they are the 3" mags with the 300grn poly tipped sabot. at 100yd I was managing 1-1.5 inch groups when I did my part. if you have the plastic stock on your 500 you might want to try adding some weight to the inside of the stock, it helps tremendously with the recoil. I put three 6" X 1/2" pieces of copper tubing hammered and crimped then filled with #7.5 shot then again hammered and crimped again. I then packed saw dust around them to keep them from moving around. in the pic you can only see one of them but there are three. It added about 1.5-2lbs to the gun.


this is the target at 100yd. with the Remington 3" mag with the 1oz slug.

Sorry no pics of targets with the sabots.