Shotguns do not have "bullets". They have shot in varying sizes or slugs.
The standard lengths for .410 shells are 2.5" and 3"
The actual slug or shot column inside the shell is about 3/4" long.
NO, NO, NO, NO. DO NOT ATTEMPT TO DO THIS!!!!!!!!!!!!!!!!!!!!!!!! Shotguns use shotshells, not bullets.
No.
Yes
Yes try hushpower .410 12 & 20G
6
i DID
the Winchester 9410
Shotguns don't use bullets. Do you mean without a case or non lethal projectiles? If so, yes they have caseless ammunition.
Dozens of makers have made 410 shotguns over the last 100 or so years. Winchester, Remington, Ithaca, Purdey, H&H are a few.
None.
100-300 or so
Yes. Was looking at a new Remington 870 pump .410 shotgun today, in fact.