Author Topic: 30-40 Brass from .303 British  (Read 1229 times)

Offline Grapeshot

  • Grapeshot. Cpt US Artillery
  • Top Active Citizen
  • *
  • Posts: 1101
  • WARTHOG
30-40 Brass from .303 British
« on: July 22, 2014, 09:03:24 pm »
I work at an indoor range that allows rifles to be fired as long as the ammo is soft point, hollow point or frangible.  I found 16 PPU .303 British brass that someone left on the floor.  After looking at them and taking them homer I measured the head diameter was .001 smaller than the head diameter of my .30-40 Krag Brass.  So, just for kicks I ran them through my .30-40 Sizing die and set the shoulder back a bit.  I then loaded them with 11 grains of Trail Boss and a 200 grain cast round nose GC bullet.  They shot very well at 25 yards.  I am curious if anyone else ever tried this.

The reformed brass is a few thousandths shorter than the factory .30-40 brass.  But since I am on a very strict budget and on a fixed income, any method to get shootable brass is fair as far as I'm concerned. 
Listen!  Do you hear that?  The roar of Cannons and the screams of the dying.  Ahh!  Music to my ears.

Offline Sir Charles deMouton-Black

  • THE ANCIENT SUBSTANCE ENDURES - ALL LESSER PROPELLANTS SHALL FIZZLE
  • NCOWS
  • Top Active Citizen
  • ***
  • Posts: 6044
Re: 30-40 Brass from .303 British
« Reply #1 on: July 22, 2014, 09:22:48 pm »
.303 Brit & .30-40 are fraternal twins.  I haven't had to convert one to the other, but I use them both to convert to .375 nitro Express.

I say you have nothing to lose.  Go for it!
NCOWS #1154, SCORRS, STORM, BROW, 1860 Henry, Dirty Rat 502, CHINOOK COUNTRY
THE SUBLYME & HOLY ORDER OF THE SOOT (SHOTS)
Those who are no longer ignorant of History may relive it,
without the Blood, Sweat, and Tears.
With apologies to George Santayana & W. S. Churchill

"As Mark Twain once put it, “History doesn’t repeat itself, but it does rhyme.”

Offline pony express

  • Top Active Citizen
  • *
  • Posts: 3420
Re: 30-40 Brass from .303 British
« Reply #2 on: July 22, 2014, 09:34:05 pm »
Grapeshot, you're not the first. I was just reading recently(Not sure where, maybe on Gunboards) that during WW2, when reloading compomnents were even harder to come by than they are now, Surplus 30-40 was readily available. So they would break them down for components, to reload other calibers, and for .303 they would just trim the neck a bit and reload them.

Curious, though...30-40 brass has a bevel on the rim, that 303 doesn't. I never looked, but I guess since it worked without the bevel, then the Krag bolt face must not require the bevel.

Offline Major 2

  • "Still running against the wind"
  • Deputy Marshal
  • Top Active Citizen
  • *
  • Posts: 12202
  • Cracker Cow Cavalry
Re: 30-40 Brass from .303 British
« Reply #3 on: February 03, 2020, 04:09:43 pm »
I have not needed to use one for the other either ,
 however I discovered my Trail Boss load & the  Missouri Bullet Co.  .3115  High Tach coated Mosin Nagant bullet
works very well  for both  my Krag & SMLE.  That was after slugging the barrels and working up the TB load no need for GC's

https://missouribullet.com/results.php?pageNum_rsCWResults=2&category=6&secondary=36

#1 Russian-Grooveless
.312 Diameter
167 Grain FP - Grooveless
Brinell 20
For Mosin-Nagant
Hi-Tek 2-Extreme Coating
when planets align...do the deal !

Offline Baltimore Ed

  • Top Active Citizen
  • *
  • Posts: 1235
Re: 30-40 Brass from .303 British
« Reply #4 on: February 03, 2020, 04:22:45 pm »
I was given a bunch of 303 so when 30-40 was so hard to get i used the 303 in my krag scout and the hard to get  30-40 in my krag school rifle in order to keep from over working the brass. There is enough difference in the 2 rifles chambers that only full length sized brass works in both but I neck size the brass and then keep the brass segregated. I shoot less than 100 yds usually so I can?t see a difference downrange.
« Last Edit: February 03, 2020, 04:25:37 pm by Baltimore Ed »
"Give'em hell, Pike"
 There is no horse so dead that you cannot continue to beat it.

Online RattlesnakeJack

  • Top Active Citizen
  • *
  • Posts: 1670
Re: 30-40 Brass from .303 British
« Reply #5 on: February 04, 2020, 08:54:18 pm »
The difference between the rim diameters you measured is less than the SAAMI specs would suggest, at .005" ... note how close the other truly critical measurements are ... i.e. rim thickness and case body diameter just ahead of the rim:



In fact, these cartridges are so close dimensionally that when the Canadian and British Governments were acquiring Mills cartridge belts and bandoliers during the Second Anglo-Boer War (1899-1902) no modification whatsoever had to be made to the .30-40 cartridge loop specifications to work perfectly with .303 cartridges ...



Rattlesnake Jack Robson, Scout, Rocky Mountain Rangers, North West Canada, 1885
Major John M. Robson, Royal Scots of Canada, 1883-1901
Sgt. John Robson, Queen's Own Rifles of Canada, 1885
Bvt. Col, Commanding International Dept. and Div.  of Canada, Grand Army of the Frontier
Old West ClipArt & History Website:  http://rattlesnakejacks.com/

 

Menu Editor Pro 1.0.2 | Copyright 2014, Matthew Kerle