If there was a better way with this gun it would have been done at some point in the last 122 years...
The problem is its a rimmed cartridge. It takes a lot of space to load the magazine without getting rim locked. The soviet svd and romanian psl both use this cartridge but they are limited to ten rounds in a magazine wider than the reciever of the 91-30 and longer than the action can cycle.
Your not going to find any good solution outside a different stock/mag combo.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent