21 inch barrel?? i got the express mag with the 21 inch barrel and shoot a undertaker hevi shot tube as well..ive seen the same results..will kill a turkey with every shell ive tried. the old remington hevi shot high velocity 6s patterned the best. i put nearly 200pellets on a sheet of computer paper at 35 or 40yds. i think my loads are 1 1/2oz loads..and think theres something like 356 pellets in the shell so thats pretty dang good IMO. i got 4 left..got 5 hevi 13 #5s to test for next year..and hevi 13 now makes a 2oz load...thats something like 476 #6 pellets in 1 shell....that swarm should be devistating to say the least....