7mm Rum to 338 edge

[JasonYuke]

Been having a hard time sourcing 300 rum , a fellow gun nut suggested I use 7 mm rum which I happen to have on hand.

Anyone ever do this conversion.

I annealed 30 cases of once fired to try this. Just waiting on 338 rum dies.
I am not so worried about run out or case thickness. Just not a lot of info on this

I assume the 7 and 300 rum case are pretty much identical.

Jay

 

[accumark]

there is .002 difference in shoulder diameter, this may cause feeding issues and may be the way its been designed so cartridge swapping can not take place. I shoot an edge but paid the piper and sourced out the Bertram brass cost more but so far seems to be paying off, my buddy uses Remington brass and after 2-3 reloads has primer pockets out up. Pay now cry once and be done defensive edge may still have some when I first got started I ordered mine thru a company in New Zealand that ordered it from Australia took 4 months to get them. Good luck enjoy and have fun it is a great round to play with.

 

[JasonYuke]

Thank you for the advice I may order this and for now play with the brass I have

I only suggested this because I have a surplus of 7mm rum of 200 plus once fired cases.

Jay

 

[accumark]

sounds like that is a starting point to order they are not cheap defensive edge is 333 per 100 rounds U.S. plus shipping duty and exchange but I believe they are in the same quality as Lapua. from over seas it took over 4 months to get came in around the same price may be a little more but at the time defensive edge had been out of inventory for many months I had not option guess I could have gone the Remington way! As well if you don't have one yet its a very good thing to have is an Annealing machine keep that brass at its best.