Do any of you guys know what the real difference between a .338 express (aka .338-.404 jeffries) and the .338 EDGE. I know that both catridges are built off of the .404 jeffries case but I am having a hard time trying to find the case dimension of these cartridges to compare.
I would say not much at all , the 404 necked down to the 338 might hold a little more powder , I think the RUM cases are a little shorter that the parrent 404 but I could be wrong
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James I think they are a little shorter so remington could fit them into their current actions instead of designing a new one for the ultramag which is what they should have done. The other difference is that neither is as powerful as the 338-378 or the 338-416 rigby so what does it matter. Just kidding, I like the fact that much power will fit on my sako actions.
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Predictions are difficult, especially when they involve the future
My guess is that the .338 Express uses the 404 case necked down.
This would make the 338 Express have a rim dia. of .537 and it has a shorter
case body ( Less powder capacity than the .338 Edge )
There is a cartrige called the .338 Abe Express that has a rim dia.
of .541 an a case length of 2.240.
Also I think the Edge is based on a 300 RUM case with a .534 rim dia.
( standard magnum bolt face )
The .338 RUM is shorter than all other RUM's ( Case length is 2.295 with
a over all case length of 3.60 )
The other RUM's have a case length of 2.845 and the same 3.60 overall case
length to fit in the magnum length actions.Note: what I'm calling 'over all case
length' is just the brass not the loaded round!!!!!
I looked into the Dakota rifles and they use the 404 case on most of thier
rifles and they had a case head dia. of (.545 )
requiring opening the bolt face on all standard magnum bolts.
If I am wrong about any of this please correct me.
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