I am in the process of headspacing my barrel and was wondering what the is the thickest recoil lug available? I am using a dual port action and an edge barrel I just got from from Mcgowan. There is about 1/8" of threads showing on the barrel after headspacing. I used the go gauge and an empty case so the headspace looks good. I am using the recoil lug that came with the action so it looks like I would need one that is 3/8".