I have recently acquired a 2 to 3 year old NEf 50 cal barrel which I want to use on my SB2 NK reciever.
I do not believe the barrel fully "locks up" although it is very close. (I can not open barrel by hand without pushing on the break open release lever, but I do not have to push the release lever as far as I do as with the .223 barrel. The height of the lever also seems to be ever so slightly lower when barrel is closed on the 50 barrel.
Am I right in assuming that the half moon cutout on barrel lug needs to be filed down a bit so as to slip a bit further over the locking rod in the reciever?
If so what is the proper method and tools?
I would not attempt this "head spacing" myself in a rifle barrel, but considering this has the breechplug I am tempted to try this myself.
Thanks, Kelly