Since gramps died last fall we are still going through his gun collection. There is a mauser action barrel stamped 257 mag. It seems there was only the 257 weatherby mag which it seems a lot were built on mauser actions. My ddad seems to remember gramps saying it was a 257AI. If you look in the chamber it doesn't seem as though there is a recess cut for the belt. I saw the 257 wmag was made off a 300hh case so we cut one down below shoulder but it wouldn't chamber..but I am wondering if that was because it wasn't sized. Any thoughts? I was thinking if maybe someone had an empty 257 weatherby mag case they could size and send me to see what this gun is. I would gladly return it. Thanks guys

I would get some cerrasafe so your 100% sure, I have used paraffin a couple times but it takes some cleaning afterwards. You don't want to take a chance on something chambering and being wrong. Most of the Mausers I've come across in 257 are of the Roberts variety and it is very possible that a gunsmith not wanting to step on Ackley's toes at the time may have designated it a mag if it was the AI.

Lamina,

I'll gladly send you a piece or two of 257 WM brass - PM me your addy!