I think you are right! If you look at the bottom of this page at the .303 head stamps, they have the same funny character symbol that looks like upside down question mark.
http://davecushman.net/headstamp_supplement.html
and here...
http://www.dave-cushman.net/shot/303headstamps.html
And here, it is hard to see but I think it is the same...
http://www.dave-cushman.net/shot/303headstamps.html
THANKS for your help!
http://davecushman.net/headstamp_supplement.html
and here...
http://www.dave-cushman.net/shot/303headstamps.html
And here, it is hard to see but I think it is the same...
http://www.dave-cushman.net/shot/303headstamps.html
THANKS for your help!