I ordered a barrel for my 110 savage in 375 Whelen Improved (40* shoulder) about a month ago. I received the Go gauge today to use for headspacing. The shoulder on the go gauge is 17.5* instead of the 40*. Is this correct or have they sent me the wrong gauge. The etching on the side of it say, 375 Whelen ACK GO PTG. The tube even says .375 Whelen ACK 40 Deg. Thanks
And yes I checked on our comparator at work, It's 17.5* just like a Standard 30-06 brass.