338 Edge vs 338 RUM, Whats the difference?

[memtb]

Please excuse my ingnorance

But could someone please tell me the difference between these two.

Thanks in advance
300wsmmad

The biggest difference …..the Edge has one more letter in the name! And, though inconsequential…..the RUM available as a factory load! memtb

 

[TXTrained]

300m WSMMAD:
The 338 EDGE is what the 338 RUM should have been. They shortened 300 RUM brass and then necked it up.The 338 EDGE is just a 300 RUM necked up and not shortened before necking it up.While the 33 RUM is said to be more accurate because most shorter cases are more accurate usually.