338 ultra 338 edge

[7101stelk6pt]

what is the difference between the 338 rum and the 338 edge

[jwp475]

The 338 RUM case is shoter than the 7mm,300Rum,375RUM the 338 Edge is the 300 RUM necked up to 338 Cal with no other changes.......................

[James Jones]

The Edge is a 300 RUM case necked up to the 338 caliber.
The 300 RUM case is a bit longer at the shoulder thus holding more powder , 6-8grs more if I'm not mistaken.

[7101stelk6pt]

thanks ,

[royinidaho]

I'd figure about 150-200FPS advantage w/the Edge w/300 SMKs