The question was "what projectiles can I shoot from my smoothbore?".

The answer is, "any factory loaded shell of the correct length for your chamber".

You can even fire sabot-type slugs if you so desire. BUT, this kind won't shoot very accurately at any distance out of a smooth bore tube- it isn't dangerous, it just ain't accurate!

For killing power, like I said before: the Lightfield Brenneke slug copy, or the Original Brenneke type, are the BEST KILLERS. If your barrel shoots them accurately, use them. If you HAVE to use some brand of Foster-type slug to get accuracy, use that kind! They will kill deer.

Pattern your shotgun with any buckshot load you might contemplate using, to determine how far away the pattern stays tight enough to make multiple hits on a deer-size target. I would want at least five 00-buckshot in a vital area, and more would be better. Likewise, it would take alot more of the smaller sizes of buckshot to kill a deer efficiently.

I solved this deli=emma for myself, by swearing off the use of buckshot for any purpose.