mossy bantam 500 shooting hevi13#6 3inch polished barrel last year and have taken about 7 shots out of it since.pg tube in 555 shells are older 10 to a box.only have put 1 #6 down it as just got them. it was about 50/60 degrees yesterday.at 40yds got 60 / 72 /59 pellets in a 11inch circle by drawing 3 different circles around what i thought was the densest area.paper was 22w by31h with a total of 174hits.my thinking is that i should go to a 570. anybody have any ideas