Without polishing or other minor mods, the one thing that has made cycling the bolt easier when pushing a round into the battery is to push the bolt handle towards the center-line of the action as you push the bolt forward.

Sanding and polishing .005' to .010" off the OD of the old style firing pin spring helps, don't overdo it. Start at five. Polish it smooth on the OD and the edges of the ends. Polish the part of the lug raceway that the cocking piece pin rides on. Use a quality diamond hone if you can.