I have shot truncated cone Yellow Jackets through my new 715T (25rd mag) after cleaning and oiling the rifle and mag (I cleaned up the mag, disassembled, with a file on the high spots and sharp edged of the red follower too before firing it for the first time). It was a b*tch to get the first round loaded, but after that it fired 25 rds. in single shot and rapid fire UNTIL it ftl the next round and on inspection the cone was damaged. I don't fire them anymore, of course. I have had very decent results (not great) with Remington Sub Sonic. Can group shots @ 25 yds. in .5 " WITH laser or open red/green dot holo sight. SIDE ISSUE: members take note With my carry handle 715 I cannot get even close to sighting on target @ 25 yds. (even top of sight is too high on target. These stock sights are crap! I cannot believe Mossberg would let them out the door designed like this! Called Mossberg, they INSTANTLY asked when I purchased this 715T, I said around January, they IMMEDIATELY said, "Send it back. There is a problem with the barrel/rifling". QUESTION; Do Remington Sub Sonics, being un-plated lead nose, foul the barrel with lead as I have read some brand of lead nose bullet apparently do???