Model 12 F/TR chamber dimensions?

DougG · 12-31-2010, 06:06 PM

Could anyone tell me the diameters of the case body and neck chambers for the 12 F/TR? Or where I could find it? Thanks.

**Blue Avenger** · 12-31-2010, 07:17 PM

they are normal saami spec

http://www.saami.org/

DougG · 01-06-2011, 11:46 PM

Thanks. I reviewed the diagrams on the site as suggested. The diagram of the cartridge neck O.D. is constant at .3435, however, the neck chamber starts at .3462 and ends at .3442. This is surprising as I expected to see a parallel dimension. Did I read it right and if so why is chamber like this? It would seem that this would be an issue in resizing after fireforming. Maybe.