Home Forums Hunting & Shooting Hunting Rifles 1910 Mexican 9x57 questions

What load did you settle on for it, weagle?

I haven't done any reloading for it yet. I have some factory 245gr Kynoch ammo that I'll be hunting with for now. I did get a chance for a quick site in session at 25yds. It was sort of wobbly set up so I figured there wasn't any use in trying to really dial it in until I can get down to my property and shoot it at 100, but it was easily minute of deer.

Last 3 shots at 25yds.

If you decide to use .358 bullets, I can recommend the 250 RN Hornady. It shoots well in my 9X57 and swatted a nice buck in a most effective manner. I cannot imagine that the extra .002" will be a problem for you with careful load workup. An acquaintance (and long time 9X57 shooter) from Germany shoots them regularly in his .356" bores.

I plan to shoot .358 bullets through it. I've got a ton of 35 caliber components and .358 bullets slide cleanly into the fired cases. My understanding is that if the chamber neck has sufficient clearance to cleanly release the bullet that the extra .002 shouldn't make any difference.

Right now I am thinking I will go for a .358 winchesterish load with a 200gr spirepoint for hunting once I run out of the Kynoch factory loads. I love the nostalgia of the heavy round nose bullets, but they are overkill for Georgia.

I also want to develop some plinking loads with a 150gr remington PSP since I have a shoebox full of them. Maybe also a screaming coyote / armadillo exploder with the same bullet.

I suspect that most any 358 bullet 200 gr or more will do the job. I'd also love to see some high velocity 150s rearrange a coyote's anatomy for him. However, some serious scope adjustments between loads will certainly be required.

I took the nostalgic route with mine wrt to jacketed loads....250 gr RN all the way. It will never be used for anything but whitetail. I did work up a 246 gr gas checked cast load for plinking and, just maybe, whitetail as well.

Pls keep us posted on your hunting results with this classic. But, don't leave the Brno at home by itself all season....

I'm liking your 9x57. For a couple of years now I've been debating whether or not to put a 9x57 barrel on a 1910 Mauser action I have, or to rebore and rechamber one of a pair of JC Brazilian VZ 24s with very pitted bores. The late Larry Brace (great custom gunsmith from Eugene, OR) once told me that his favorite action to work with was the Mexican 1910, and that he wanted to put one together in .358 Winchester for a western Oregon rain forest elk rifle. I never did ask him why he wouldn't just use the 9x57 Mauser chambering but with .358 groove diameter instead of .356. Taking into consideration that the 9x57 is essentially nothing more than a necked up 7x57 (not sure which came first) with essentially the same shoulder diameter (.431) and case taper, it seems likely that the 9x57 ought to feed smoothly from a Mexican 1910. FWIW, Larry said he always had Model 1910 Mexican Mausers re heat treated.

There was a good article on the 9x57 in the August, 2004 edition of The Accurate Rifle by Tom Wilder. His rifle was a large ring Model 98 Mauser, which looked to have started life as a K98 in 8mm, then rebored and chambered for the 9x57. The loads he eventually settled on where about half way between the .358 Winchester and the .35 Whelen.

Very very cool!!!

Any reports from the deer woods with this sweet old gun yet?

You guys are fortunate your 9 X 57's come in at .356. My ancient JP Sauer & Sohn slugs to .352 so guess whose swaging jacketed bullets. I worked up a cast load for it but the rifling is so washy for a few inches in front of the chamber some would shoot well and others would tumble...badly. So, 250 gr. jacketed bullets swaged to .353/.354 are what it eats. Cool old cartridge and usually chambered in some cool old rifles. I also have a Husky 9.3 X 57 with the usual tight throat and loose bore of the Husky's. I have both cast and jacketed loads worked up for it and it's a sweety. I had to turn the necks to make the cast bullets work.

4 trips and nothing so far. The bucks should be chasing in Jasper Co Ga so I hunted sun up till 4pm today... NADA. Itching to use one of those 50+ year old Kynoch 245gr bullets for it's intended purpose. I'll be back at it tomorrow.

Finally pulled the trigger on a small buck today with the 9x57. Typical .35 cal performance from the old 245gr Kynoch soft points. Both lungs and lights out.

Congrats weagle, looks to be fine eating.

Yep. Tasty.

I hit the motherload of 9x57 ammo on an auction. A full brick of Kynoch 245gr soft nose, plus 100 reloads that appear to be loaded with nosler ballistic tips. Plus I got a few bonus rounds on stripper clips.

I killed a deer last year with some of the old factory ammo, but while sighting it in I had a couple of hangfires out of 20 rounds, so I don't really trust it for hunting ammo.

My plan is to keep a couple of boxes for nostalgia, and tear down the rest of it to reload.

Very cool! I have a Wis bear hunt starting next week. That would be a great rifle for that. I'm using a Whelen but that is a neat looking round!

I shot my first handloads today. I went with a 200gr Remington RNCL and worked up to 48.5gr IMR 3031. This was a half grain under the max load from the online Hodgdon reloading page for the .358 winchester. I didn't shoot it over the chronograph, but I'm figuring 2500ish FPS from the 23 inch 15" twist barrel. My last 2 groups were 1.75" at 100 yds. I'm not going to start chasing better groups till I replace the 2 stage military style trigger. For now it's good to go for the deer woods.

Congratulations on how your 9X57 has worked out for you! Hope you make meat again with it this season.

But, don't ignore your Brno 22F.....

Still haven't put in a commercial trigger, but I did a little work on the military trigger, so I've got decent 2 stage trigger. Hopefully this weekend I get to test the handloads on a deer.

Dang, I like that rifle.
Simple straightforward hunting rifle with refinements.