What is this cartridge exactly please? I'm told that it is Rigby's designation, no more no less, than the 7x64 when chambered and sold in Rigby rifles.

What I'm not seeking are references to the cartridge noted in COTW as the rimmed .275 Rigby No2 Magunum.

Thanks to all who read and to all who can educate me!

According to John Donnelly's "The Handloader's Manual of Cartridge Conversions" the note says "see 7m/m Rigby magnum."

Specifics:
rimmed b/n case
case length 2.49"
head diameter .470"
rim " .528"
neck " .315"
neck length .35"
shoulder " .060"
body angle .975
case capacity (cc's) 4.16 [GR's H2O 64.23]
loaded length 3.25"
rim thickness .047"
shoulder diameter .406
length to shoulder 2.08"
shoulder angle 37.17

This is the same case listed in COTW.

enfieldspares, in my rigby catalog of 1924 ammunition is listed as 'RIGBY MOCEL NUMBER 2 HIGH VELOCITY" it is a 7mm with a 140 grain bullet the gun is sighted in for this load only there is no mention of magnum....paul

The only 275 Rigby I'm aware of is just that, not Magnum. The 275 Rigby is a 7x57 Mauser with Rigby's spin on it to sell to the brits. Just a marketing ploy, although the throat for the Rigby is said to be shorter than the 7x57.

David

It is my understanding that the 275 Rigby is indeed a 7x57 Mauser. The British touted the cartridge as High Velocity by loading the round with 140gr bullets instead of the traditional 175gr german loading. The rate of twist on British Rigbys would be 1/10 twist with a short throat and sights regulated for the 140gr bullet.

Just my 2 cents.

Jeff