338 Edge brass from 338 Rem ultra

[300 whby]

Hi gents anybody tried fire forming the above ? or is it too much of a stretch for the Rum brass..i've just got back my Savage 110 rifle from the gunsmith with a new stainless match grade barrel, muzzle brake ect It's in a Mcmillan stock, Niightforce 8-32x 56 NXS 30 Moa Farrell G force rail TPS rings US optics cant level Rifle Basics trigger..She's ready to go, BUT i don't have my reloading dies yet, I have 40 Bertram Brass 338 Edge cases but they need to be full length sized, so hence the question.
Any thoughts would be greatly appreciated..
A man can't have a new gun & not fire it, thats just not on..

 

[AZShooter]

No way can you make the shoulder move forward .0915''. I'd bet it would separate at the web/body junction. Buy some more Bertram brass......

 

[300 whby]

Thank you,new Bertram Brass it is...