The Lone Wolf could take ~8oz off but you've decided against that. I don't imagine the Stockade bolt handle is super light, might go aluminum(or TI?). You could do the same with the recoil lug and maybe the trigger with a steel insert for sear engagment. Boring the inside of the bolt could save a little over external flutes without disrupting function. Going up in bore size would save some weight, as would going to a larger chamber. Maybe replace the nitrogen in the scope with helium.