is it the 'judge' with your .410 in the chamber?Sabots are for rifled barrels only. Only rifled slugs threw the smooth bore. And for now #3 is better than bird shot. I had some #3 3" mag turkey loads for the 870 but they didn't last long, (I discovered that blowing shit up with magnum loads is fun) Now it is 00 and rifled slugs on the butt with an empty tube. (I have my pistol next to the bed)
i found a website that sells mil-spec smoke nades. if in doubt smoke em and shoot till your outta ammo, granted the smokes $39 per nadeMy gun is a winchester 1300. The barrel says I can use 3" shells. The ones i got were #3 buckshot, not 000 buck in 2 3/4ths in shell (20 pellets). It was what they had at Academy. I checked bass pro shop, and all I saw was some sabot rounds for 20 gauge. There is just not a lot of options for 20 gauge . . . . .
I guess I could look online, but I'd rather not pay too much.