303 british extractor?

[butlersrangers]

I've never owned a Krag with a terribly excessive bore diameter.

Most of my Krags have been model 1898 rifles and model 1899 carbines, with groove diameters running .3085" to .309".

A jacketed projectile, for .303 British, running .314" diameter (or .311" diameter), coupled with the heavier powder charge and pressure of .303 loads, as Dick Hosmer states is a needless risk.

[Sunray]

"....303 British, running .314" diameter..." That'd be an oversized, very close to worn out, barrel. The Brit uses a .311" bullet. There are no commercial .314" jacketed bullets either.
SAAMI Max pressure for .303 British is 49,000 PSI. CIP max is 53,000 PSI. MAP for the Krag is 400 CUP(no PSI figure).
In any case, like Dick says, I suspect the guy doesn't know what he's talking about.
The rim thickness and diameter on both is the same. No need for a different extractor.
Oh and no amount of bolt turning is going to form any case.

[Parashooter]

. . . SAAMI Max pressure for .303 British is 49,000 PSI. CIP max is 53,000 PSI. MAP for the Krag is 400 CUP(no PSI figure).
. . . Oh and no amount of bolt turning is going to form any case.

Horsefeathers! The Krag action has plenty of camming power to move the .303 shoulder back the ~.050" needed to form a nominal .303B case to fit a normal .30-40 chamber. How do I know? I've done it - and the results are shown in the photo posted at item #3 in this thread.

Pressure information below is copied from current SAAMI publication (MAP in CUP: 303B=45000, 30-40=40000). Comparing CUP (crusher) to PSI (transducer) figures introduces unnecessary confusion, particularly if one fails to multiply a SAAMI CUP table figure by 100 as indicated by the column header ("CUP/100").

SAAMI303Bv3040.jpg

[madsenshooter]

I've done that too. I had a .311 groove diameter barrel on the Krag I used. They were 173gr Russian steel jacketed bullets from Wolf Military Classic .303 British Ammo, the stuff with the delay fire primers. In the end I wound up pulling the bullets, dropping the powder charge a couple grains, and loading them in Krag cases. They shot pretty good, I still have many of the loads. If someone starts importing Berdan primers again, I might have a use for the Bi-metal .303 cases one day.

[coastie]

Possibly you could have an "unbarreled" action.

[Dick Hosmer]

This category seems to have died - guess everyone's questions have answered.