Saw a very beautiful custom rifle the other day. Action was a 1903 Springfield. Excellent walnut wood and the barrel was marked "Mashburn Arms 300 Mashburn Short Magnum"

Anyone able to tell me about what the background on the rifle was?

Not sure what the 300 Mashburn Short Magnum is, love to see a picture of that sucker though!

I’m thinking you’d have to want the rifle awful bad to warrant venturing into uncharted cartridge territory.

https://loaddata.com/Cartridge/300-Mashburn-Short-Magnum-PO-Ackley-Data/6567