Making 338 Norma Brass

[Jremps]

Just wondering if anyone has necked up 300 Norma Brass to 338 Norma? I have 200 pieces of Lapua brass left over from my 300 Norma and would like to utilize it if I can.

 

[WeiserBucks]

I'm also interested in this for a future project. Tagging in for information.

 

[Swamplord]

you'll need to fireform it, the 338 NM is not simply a necked up 300 NM, the 338 has different (larger diameter) dimensions at the shoulder,

unless you order a reamer designed as necked up 300 NM brass, aka the 338-300 Norma Mag..... such as the 338-300 RUM aka 338 Edge

 

[Swamplord]

cartridge dims as found in the Norma Reloading manual

 

[Jremps]

you'll need to fireform it, the 338 NM is not simply a necked up 300 NM, the 338 has different (larger diameter) dimensions at the shoulder,

unless you order a reamer designed as necked up 300 NM brass, aka the 338-300 Norma Mag..... such as the 338-300 RUM aka 338 EdgeView attachment 208582View attachment 208583

I was thinking about that. I can use the fire forming loads for barrel brake in. Thank you for the response!