anyone use hevi 13?? i had a guy on another board recomend it when we were talking about remington hevishot......so i took a trip to the local gander mountain since they are the only ones around that sell it...they were about sold out......had a few boxes of 3.5 inch and a few boxes of 3 inch....i bought a box of 3 inch 1 5/8oz of 5s.....just wondering how it patterns and performs for you guys.....im shooting a 870 express mag with a 21 inch barrel and a Undertaker Hevishot tube..and they say i can shoot it through my factory remington choke without problems that is not rated for hevishot....they claim unless im shooting mass quantities..like goose hunting..that itll be fine because of they way its waded and buffered....so would it be safe to try both chokes?? i think they are both .665 but i may be wrong...any info or users?? thanx..just curious....ill be making a range trip sooner or later.....im itchin to shoot the 50cal flintlock...so ill get out sometime in the future...i got 4 remington hevishots left so ill hunt with those for the remainder of the season since i know how they pattern...