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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles

470Rigby
.333 member


Reged: 23/02/04
Posts: 328
Loc: Melbourne, Australia
Re: 577/450 BP Express?
      05/12/04 09:09 AM

In reply to:

One reference to it is in the class rules for the Big Game Rifle Club. .577/.450 Martini Henry must use the 'express' load.





The Big Game Rifle Club merely specifies the .577/.450 Martini Henry "Express" load as requiring a maximum bullet weight of 325 grains, over and above the general class requirement for a minimum case capacity of 90-gr of Black Powder.

However, using the definitions required for "Class 3" (Double Rifles of .450 bore) Express Rifles for the Field Rifle Trials of 1883, this would also extend to;

* Weight not to exceed 8 lbs
* Barrel length not exceed 28 inches
* Powder charge not less than 4 drams (109.375 grains)
* Bullet weight not to exceed three times the weight of powder (this would require a Black Powder charge of at least 108.3 grains for 325-gr bullet.)

So - the 325-gr Bullet/90 grain powder load is not strictly an "Express" load, if you use the definitions of the day! AND - considering that modern Black Powders are down about 20% in "grunt", a 90-gr powder charge would come nowhere near developing true "Express" ballistics!

Accordingly, no .577/.450 MH rifles were submitted for the 1883 trials, and IMO, it ill-behoves The Big Game Rifle Club to re-write history!


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Entire topic
Subject Posted by Posted on
* 577/450 BP Express? DoubleD 03/12/04 10:03 AM
. * * Re: 577/450 BP Express? Marrakai   04/12/04 12:52 AM
. * * Re: 577/450 BP Express? 470Rigby   05/12/04 09:09 AM
. * * Re: 577/450 BP Express? DoubleD   04/12/04 02:55 AM
. * * Re: 577/450 BP Express? 4seventy   04/12/04 10:43 AM
. * * Re: 577/450 BP Express? DoubleD   05/12/04 02:10 AM
. * * Re: 577/450 BP Express? pwm   04/12/04 06:10 AM

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