How you load your M4-410™ or SHOTPISTOL™ is a matter of personal preference.
However, a preferred loading might be:
(Note: impossible to achieve with any Taurus due to only 5 Shot capability....)
1) warning shot using 7-1/2, 8, or 9 shot in any 2-1/2 .410,
2,3) #3 Buck Shot- 2-1/2 .410
4) .410 Slug- 2-1/2 .410
5,6) Winchester Silver Tip .45 Colt