Thread: 223 over resized brass?

Gidday Folks

I have recieved some Sako 223 brass, once fired, resized and cleaned.

However I just happened to measure it with a comparator (not the proper headspace one, just a bullet type) and as far as I can tell the shoulder is about 20 thou to far back (compared with my other brass measured by the same method). We don't know how this occurred, he thought he sized it "normally".

So I either need to borrow a proper case guage (down here in Southland, I tried the local gunshops but no one has one) to determine if I do in fact have a problem, or find a way of fixing it - fireforming or false shouldering it maybe?