have a buddy . ready for hunt in two weeks ..rem700 action with only 60 to 80 round total rounds fired.. rr serial (possible timing) .. but seems more like the riveted rem extractor is sticking/staying in too far . it it cutting brass off the rims and it seems to be sharp with no signs of wear .. i picked out quite a bit of brass grit .. that i thought might be binding it up, cleaned out with compressed air and brakeclean , lubed, sprung it did it again .. lubed , blew out seemed to work with spent brass but not for long .. he is going to have local smith swapp that rem extractor out .. but id like to suggest to him to upgrade it to a better extractor.. which leads to this titles question .. so this rifle shoots exceptionally well the way it sits ..so trying to use existing bolt and not removing the barrel , is that possible??? can you safely install an m16 extractor on a factory remington bolt??, if so, is there a tool to open up the bolt nose Opening without .. removing the barrel?? sako type .. i have heard that no bolt nose opening is required for a sako type extractor .. i would think that some is nessicary ? can any one explain why that is .. doesnt the sako also exceed the outter diameter of the bolt too ??