It is a shell for a shotgun that has less power than a standard shotshell, and produces less recoil, or "kick".
Fast bullets and low recoil is the good point. Low damage though.
you will have to do a web search on 44 shotshell ammunition.
That will depend on what you consider "low recoil"
The quick answer is a .410 bore - but there are relatively low recoil 12 ga. guns as well. Browning made a "recoiless" trap gun which almost is recoiless. In general, a gas-operated semi-auto will have less recoil, and in some cases this can be combined with a recoil-absorbing stock.
shotshell
Recoil is when the gun kicks from the cycling of the bolt or slide when ejecting spent cartridges.
A shotshell.
The recoil of the rifle bruised her shoulder.The recoil sent him flying backwards.
The prefix of "recoil" is "re-".
You can never stop recoil. You can reduce the felt effects, but, the recoil will still be there.
You should be ok making that switch unless it was a low budget fixed power scope make specifically for low recoil firearms.
Using the wrong shotshell in the wrong shotgun.