I just picked up a custom ruger#1.Got it for a steal.The only problem is I dont know what its chambered for.The prevoius owner is deceased.I got 20 rounds of once fired brass with the rifle.They're formed from 375H&H brass.the bullet is 375,Thinking its either a 375A.I or Weatherby.Help save me a trip to the smith
case length is 2.825
measurment to bottom of shoulder 2.422
measurment to top of shoulder 2.500
Hope this pic helps.Thanks

Kechy
Could be the 375 JRS..blown out 8mm Rem mag I think.
Heres a link, check it out see what you think

http://findarticles.com/p/articles/mi_m0BQY/is_12_45/ai_57006116

Hard to see clearly from this distance but isn't that the correct brass length for both the .375 H&H and the .375 WBY? From the look of the shoulder rounding, I would suspect the plain Vanilla .375 Weatherby...

Barnes #6 manual has the 375 JRS in it, unfortunately I don't own one.

Heres a better pic.

Thanks for all the input guys but it seems my measurments of the bullet were way off.LOL its a 358 STA

That oughta pack some punch.