Good list David. What I was trying to figure out was where to measure the bolt head to figure out which of those sizes it is.

Hotolds442, I tried that and am not sure how it should fit. Putting in a 243 case, it seems to fit in, but there is a ring of brass visible looking from the end. Looking at the list above, it seems there are not as many different size faces as I thought.

If that is so, should be able to figure it out.

Thanks