300 win mag casing, down to 280

[TBark]

Curious, I have 12 casings of 300 win mag, not even sure how I got them.
So one of them is necked down to 280. So what is this casing for ?
Is it a 7mm ultra mag ? Head stamp still says 300 win mag, as do the others.

TBark

[catnthehat]

7mm/300mag
The ultramag is a non belted magnum with larger capacity than the standard belted magnum cases like thee 7 , 300, and 338 mags.
Cat

[Dick284]

Looks like you gots yer self a 7 em em Practical in the bunch.

[260 Rem]

Sounds like some somebody made a wildcat ... as cat said ... 7mm/300Wm.

[Dick284]

Originally Posted by 260 Rem

Sounds like some somebody made a wildcat ... as cat said ... 7mm/300Wm.

Ya a 7 mm Practical

[fps plus]

It's a smokn 7mm that one can use a standard length action. I have built some . Also done 270 / 300 win that was pushing 130 gr way past what a 270 wby mag could

[Pathfinder76]

Is it the same length as a standard 300 Win Mag?

[260 Rem]

Originally Posted by Dick284

Ya a 7 mm Practical

Correct me if I am wrong...if a 300WM is simply necked down without changing the shoulder angle it would be called 7mm-300WM. Only if the shoulder angle was changed from 25 to 30 degrees, would it become a 7mm Practical?
I suspect that would also increase the length ofthe neck?

[TBark]

Interesting info, thanks,
Yes all else is the same as the 300 Wm. no shoulder change nor overall length.

TBark

[sdeviation]

yes the Practical can use the standard 7rem mag die to form