I know this thread is getting old, but I just couldn't stand it any more. Hopefully, somebody at H&R/NEF reads these & might realize they could PROFIT from some of these suggestions.
Since Hornady started loading 9.3x74R - how 'bout a Handi in that!! Better yet, make it a EURO/AFRICAN CLASSIC along the same lines as a BC - 26" to anything up to 30" barrel. Those 9.3x74R cartridges look wicked!! I'd love to play with some cast bullet loads for that. I wouldn't even care that it wasn't a double rifle or drilling.
I, to would like a .44Mag with a .44Mag barrel (.429").
I like rimmed cases in Handi's, but any 6.5mm bore would float my boat as well.
Also, design a cartridge holder that has the same outside dimensions on the outside, cut out the center of the plastic/fiberglass buttstock, and make the cartridge holder snap into it. If all the boxes are the same outside dimension, the carrier will fit, no matter what barrel you switch to. If it's hinged - even better. I don't want to have to unscrew a bolt on the buttplate (Survivor), or stick a buttstock cartridge carrier made of black elastic cloth - I don't like having bullets sticking into my face if I switch shooting shoulders. The "Tamer" stock design is real close! Toss the .410 or 12 ga carrier & put in something that would work.