headspacing for enfields is often overblown. they generally have generous chambers which led some gunsmith at some point to write about the terrible headspacing which in reality wasn't there. go, no go gauges are easy enough to come by. that pic is pretty poor but it looks like somebody painted it black? if so that is not the correct finish.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin