I just read the thread on the 9x57 and got to wondering how it compares to my 358 Win. I think they are very close in comparison. The 358 is American vintage and I assume the 9x57 is of European vintage.

I haven't chronoed these. The 245 are 50gr of 3031. Should be 2400fps

It seems like 57mm Mauser rounds have around four or five grains more capacity than the 308 based counterparts, but the 57mm’s are generally loaded to much less pressure. If one handloads, the 57mm’s will very slightly beat the 08’s when loaded to similar pressures.

quote:

Originally posted by ColoradoMatt:
It seems like 57mm Mauser rounds have around four or five grains more capacity than the 308 based counterparts, but the 57mm’s are generally loaded to much less pressure. If one handloads, the 57mm’s will very slightly beat the 08’s when loaded to similar pressures.

There is probably not quite as much difference as four water or powder grains in the volume the two cases, but Matt is correct that, loaded to the same pressures, the 9x57 would nominally generate a bit more velocity. Not so much that any game animal would notice, however. And, depending on the chamber dimensions and barrel factors of an individual rifle, there might be no practical difference at all.

Any difference would be similar to the difference between a .243 Win and 6mm Rem; or a 7-08 Rem and 7x57 -- both of which pairs are derived from the same parents as the .358 Win/ 9x57 pairing.

Richj,
I have 5 boxes of Kynoch 9x57 sitting on my desk as I type this. Bought a small ring 98 sporter from Simpson's Ltd. a few years ago and acquired that ammo for it. Got curious and chronoed two rounds and one was 1774fps and the other 1779fps.
I'm sure age had a lot to do with it but I was surprised at the velocity. I'm sure your 3031 loads will beat factory.

quote:

Originally posted by Magnum Hunter1:
Richj,
I have 5 boxes of Kynoch 9x57 sitting on my desk as I type this. Bought a small ring 98 sporter from Simpson's Ltd. a few years ago and acquired that ammo for it. Got curious and chronoed two rounds and one was 1774fps and the other 1779fps.
I'm sure age had a lot to do with it but I was surprised at the velocity. I'm sure your 3031 loads will beat factory.

In the days before readily available chronographs factory claims were some times enthusiastic.

The best way to destroy a good rifle is to chronograph the loads you are using in it,

Wow thats really low! The 9x57 was my father's favorite caliber and he shot several tigers, leopard and even gaur with it! Using the same Kynoch ammo. And his rifle was a carbine so 18" barrel, so vel must have been even less!!!

quote:

Originally posted by Magnum Hunter1:
Richj,
I have 5 boxes of Kynoch 9x57 sitting on my desk as I type this. Bought a small ring 98 sporter from Simpson's Ltd. a few years ago and acquired that ammo for it. Got curious and chronoed two rounds and one was 1774fps and the other 1779fps.
I'm sure age had a lot to do with it but I was surprised at the velocity. I'm sure your 3031 loads will beat factory.

Kynoch 245's went 2222 & 2224fps out of our 9X57 and the loads I built for family shooting fun are running 1900fps. It's a slim and trim mannlicher stocked 98 that came back from Germany at the close of WW2.

Id probably pick by the gun, not the caliber, thats apples and oranges..