I do not have one , but to my knowledge , there is nothing wrong with a .41 Mag . But from what I have always heard and read , it just never caught on big ? I think it is very close to being an orphan caliber ?
Brass & bullets are probably less available / plentiful than a .44 . And .44 may not be a lot more expensive ?
For anyone that reloads , I would recommend the .44 Mag , hands down . You can tailor your loads anywhere from mild to wild .
And a revolver in .44 will probably sell better than a .40 , if you should ever decide to sell it .