N320AW

Re "What IS the minimum weight for this cartridge, in a well balanced weapon,
to retain it's managability as far as recoil is concerned? "

Apart from weight, recoil is party related to fit and balance but I would suggest
that 10lbs 5 oz at the minimum.

Re Also, does the .500 have significantly more recoil than something
in the .470 group of cartridges?

Recoil is definately heavier from a 500 over a 470 Class

The effect on animals is also greater from a 500 over a 470 Class.

FYI, here is a list of the weights of 500 Nitro doubles I have
or have owned. Some are really well balanced, some more barrel
heavy.

A&N (Webley) Boxlock Ejector 12lbs 12oz 27" barrels
A&N (Webley) Boxlock Ejector 12lbs 8oz 27" barrels
Joseph Lang (Webley) Boxlock Ejector 11lb. 11oz 27" barrels
Watson Bros Boxlock 11lb. 5oz 26 or 27" barrels
Westley Richards Boxlock Ejector 11lbs 22" barrels

Hope this helps.

500 Nitro