Depends on what it is choked.
Yes try hushpower .410 12 & 20G
The 410 is a shotgun round. Slug loads are available and have been made for decades.
With a slug, maybe. You had better be able to put the slug in the eye at 50 yards.
#6 shot
Depends entirely on your intended end use.
yes i have done it
No.
25-100 USD or so
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THE GUN IS A .44 CALIBER SHOTGUN, NOT A .410 CALIBER. I HAVE BEEN TOLD THAT IT MAY HANDLE VERY SHORT .410 CALIBER SHOT SHELLS OF LOW POWER BUT, IT COULD RISKY.
The 410 hammerless essex shotgun is worth anywhere from $300 to $350 in good shape.