It's the same case as the 7x57 Mauser. The specs on the throat are a little different on the drawings. The 7x57 was throated for the long 175 grn RN Bullets and the 275 Rigby was throated for 140 grn Spitzer Bullets.
Not sure if modern manufacturers honor that or just mark the guns differently.
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Have to renege on pictures of the #1 275 Rigby...
- Huey, 2020-06-05, 10:43
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- I’m sure it’s the nuts!!! I’ve posted mine - Drdougrx, 2020-06-06, 05:00
- For those not familiar with the 275 Rigby... - Huey, 2020-06-05, 11:41