Thanks but the ones I'm looking for are the ones based on the 378 case
????? HUH??...a 338 A Sq ( or also know as 338-06) is a 338 caliber BASED ON a 30-06 CASING..?? If you have a 338 caliber based on a 378 casing...then you DONT HAVE a 338-06??
338 A square magnum cases could made out of 338-378 cases Im pretty sure .
Then A square developed there newer case the 338 Excalibur a bigger case with no belt.
I see that THERE IS a cartridge made up with a 378 Weatherby casing....but it is called a 338-378 cartridge..NOT a 338-06
Thanks for the replies... but... i never said i have a 338-06. I have a 338 a square and the parent brass is the 378 weatherby. And no its not the 338/378 weatherby.
It's a 338 a square. It was developed long before the 338-3006. Art Alphin the founder of a square developed it even before there was a 338-378 weatherby. It's a 378 weatherby case with a tapered shoulder and necked down to 338 , not the weatherby radius.
Do a search on it this is what you will find........RIGHT- A - MUNDO....FALSE-A-MUNDO! A 375 case....sure...but not a 378 case!