here is what I do... used mostly in 410 snake charmer and contender 44 410 ten inch, but also made some for the taurus judge 45 410 but I was not the one that shot those....
i use a three inch shot shell, open it up and dump out the shot, put into it a few large bird shot : 5s 4s etc, enough to cover the bottom of the shot shell wad, and then put in a buck shot I like to use # 3 or # 4 but put a large buck at the very front sticking out a bit... I just put in a small buck shot push it down into the smaller shots then add more bird shot around it, then add another buck shot, bird shot for buffer, until almost full then put a large buck shot, 00 or 000 size in the end and wax over the end to seal it... sometimes cut off the folded edges and just wax the big buckshot ball into the end with it sticking out just a tad.... i like to use a bright red or other color to ensure it is not taken for a regular bird shot... at ten yards the buck shots penetrated a one and a half inch seasoned cypresss board and the bird shot clustered in and around the pattern .. the total pattern was about four inches in the contender and the snake charmer too.... the taurus is a more spray proposition, but the large bucks and large bb shot work just fine.. I got some lead bbs about 177 caliber and used those in some of the shot too and it was devastating... I am buying some more buck shot from a guy on here.. black dog lures... so I do not have to sacrifice the 20 gauge buck and the 12 ga. buck for the different sized buckshots... I just sat and made a shell belt full and have great confidence in the effectiveness on typical birdh shot quarry and on bigger tougher game with the buck shots... four to five buch shots and a bunch of #4 is nothing to sneeze at, I have killed many fox and coon with #4 and a couple of deer rabbit hunting with pure fours and fives as well... with a shot to the throat and head... sort of by accident...sort of.. or maybe I dreamed that part... cannot say for sure....any way.. I know it is fine in the contender and snake charmer, I just have not used the taurus enough to give it a resounding yea or nay.... I was dissapointed at the shot dispersion with plain 410 shot shells after the contender with the choke was used for so long... so it did not remain in the stable for that long.... YMMV.
dk