300 Magnum

[Thompsonj]

So I came across this brass the other day, just 300 magnum on the headstamp. It measures .20" longer than 300 Win mag. I'm assuming it 300 Weatherby since it measures out really close to the same, but never been around either round.

 

[victor3ranger]

That looks just like a weatherby

 

[Thompsonj]

That looks just like a weatherby

Kinda my thoughts, but didn't want to advertise for sale unless i know for sure. Might take to local gunshop and compare with some factory loads

 

[victor3ranger]

Kinda my thoughts, but didn't want to advertise for sale unless i know for sure. Might take to local gunshop and compare with some factory loads

 

[jjmp]

300 Winchester magnum
Case length 2.620 300 Weatherby is 2.825

 

[Thompsonj]

These measured 2.82

 

[sp6x6]

Think that is really old brass before Weatherby made there own, could be collector type stuff.Dont quote me on this.Unoin Metallic Cartridge

 

[jjmp]

UMC merged with Remington ARMS in 1912, they grew Big from supplying brass for WW1. Joint stamped brass ended in 1970.

 

[MagnumManiac]

Weatherby brass was made by Remington, Winchester and Bonanza while the Weatherby line was still proprietary, therefore, the Weatherby name was omitted from the name on the brass.
I remember my first 300 Weatherby running such named UMC brass and I was questioned as to what it was, as the rifle, a Winchester Model 70, also only had '300 Magnum' stamped on the barrel. In fact, my buddy had an identical model that said the same, but his was a pre '64 and was actually a 300H&H, mine was a 70's post '64 push feed.

Cheers.