Gordon, Macc, Ski ect, Headspaceing a Magnum bolt is not a requirement.. Mostly I remove .003 to .004 from face and thats to a .049 finish depth... Its not much... Unlike the L.R. bolt that really needs trimming, I do not think it does much... Firing Pin restaking was a disaster in Magnum bolt, 99% were not re-staked... So basically they get jeweled, nice but ho-hum
So I don't think dropping money into a Mag bolt is worth it... Future might be different...
I got one 10/22 Magnum bolt in house to be done... That one I will try to drill and install a forward firing pin control dowel like the L.R. version now gets... If that works, than reworking Mag bolts might be worth the money?