Latts,
I dont have any experience with the Rossi muzzy but I do have a Rossi 410 I bought for my son as a starter gun. Overall I' m very pleased with the quality of the gun for the price I paid. It was very cheap ($75) but it delivers what it claims to deliver...simplicity and reliability with no frills. However, there are maybe some even less expensive options for you to try before you spend more on a good front stuffer...specifically, why dont you try to borrow one from someone for this season to see if you like muzzleloading...it you fall in love with it, it' ll make much more sense to save your $$ up to buy yourself a nice gun that will last you a lifetime.
Good luck!
SC