7-300 win mag AI

[Wild Monkey]

Cool Round! I'd like to know any tricks to forming this brass before firing, I have some ideas about using box ammo converted.

 

[dogz]

Very subtle difference.
It's about 3 grains more in the improved version.

Probably pretty darn close to the 7 Mashburn Super that's been around since the 60's or so. Love those Big 7's!

 

[Wild Monkey]

I find 300 Win Mag is the only Magnum ammo for sale.

 

[RockZ]

I sold it to a buddy a while ago and he loves it

 

[archeratlrg]

Very subtle difference.
It's about 3 grains more in the improved version.

What's you shoulder blown out?