.338RUM Ackley Improved vs .338 EDGE

[hillbillybear]

Hi Folks,
I've been kicking around some LR rifle ideas and came across a listing (Midway) for a .338 RUM Ackley Improved.

I am just curious if this might be a different way (i.e. fireforming .338 RUM brass vs necking up .300 RUM cases to .338) of arriving at .338 EDGE powder capacity?

Thank for the input,

HBB

[Coyboy]

I don't think so. Shawns cartrige is a necked up and improved 300 RUM, which is originally longer to the shoulder than the 338 RUM. They would be very close though.

[davewilson]

shawn's edge is not an improved version of the 300 RUM case, just pushed out to 338. i would go with the edge over a 338rum imp because of brass. the 300 has choices for brass other than remington plus you don't have to fireform.if you don't mind fireforming, i'd go with the 33/300 improved before i would go with a 338rum imp.

[sniper2]

What is the powder capacity of the .338Rum Imp. and what shoulder does it have?

[hillbillybear]

If the reamer I saw listed has the usual Ackley 40 degree shoulder it should have roughly 4%-6% more powder capacity than the parent round.

Thanks for the input,

HBB

[Coyboy]

sorry, my mistake.

[sniper2]

That sounds pretty good,fireforming is not a big deal.You may be on to something good with this Imp. case... [img]/ubbthreads/images/graemlins/grin.gif[/img]