Gunsmithing 360* with a crush washer

[greg1147]

I am just about finished with my AR-10 build I picked up a Gamma VG 762, hand tight it will need a 360. Is this a possibility of getting a full turn or should I get a shim pack and go from there. I read on some other forums to sand the crush washer and try get a 180. Seems like a lot to take off the crush washer to get half a turn.
TIA Greg

 

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eh, ive crushed close to 360 before........ide give it a go......if it doesnt work out, theyre cheap to replace.