I recently loaded some 8x57's for my Turk and a Brno, here are the results:

Rem brass, primers, and 185 gr. corelokts. Used drop tube and 49.0 grains IMR 4064 and loaded bullets off the lands .010 . With original 29 inch barrel I ave. 2775 fps 15 feet in front of muzzle, E.S. was 19 fps. Load printed point of aim at 50 yards with Turk, 12 inches above point of aim with Brno, and approximately 2 inch 5 shot groups with mil-spec trigger and sights with both rifles. Approach with caution, no pressure signs with my rifles, but will vary from gun to gun. Turk was approximately 75-100 fps faster than Brno which was a surprise. Btw, I also clocked some mil-spec ammo, the cheap corrosive stuff in bandoliers, it read, and I checked it several times, 2940 average. This stuff screams, but is highly corrosive.

Good luck and good shooting,
Eterry

E.Terry:

I am sure that the powder used in the foreign factory ammo is a very fast powder.

Powder loads listed stateside are low for the usual reasons.

I played with some RL 7 with a 170 grain Speer loaded out until it was seated only about a 1/4 of an inch. The rifle was a 1923 production CZ.

The accuracy was a lot better than 2.5 inches, more along the lines of an inch or less at 50 yds. The rifle has a peep site (Lyman) and my eye site is not worth a darn, so I have to rely of 50 yds.

Once I chronographed it, I was really surprised! It was well over your 2900 fps loads. IN 8mm Rem Mag territory.

Testing the bullet into a little wood for a test media, it sure made the sawdust fly out of the back of the tree I shot it into and then the one that was about 30 yds behind it, that the bullet went thru also. Both trees had sawdust coming out of the backs of the tree after the bullet passed thru.
Haven't seen that very often.

I shot some 1943 made Turkish ammo and as you said, it was a lot stouter than the load manuals talk about.

Cheers and happy holidays
seafire

I feel safe working up a load in a 98 Mauser.

29" barrel, 200 gr, 47 gr IMR4895, averages 2630 fps, shoots sub moa, 47 kpsi
29" barrel, 200 gr, 52 gr IMR4895, averages 2880 fps, very sticky bolt, 64 kpsi

My favorite load for my M48 Yugo 8x57 is 185 grain Remington Core-Lokt bullets over 47 grains of IMR 4895, this load clocks in at 2582 fps.

ETerry, a lot of the surplus 8MM I had was 172 grain boat tails at about that speed. I remember being told it was machine gun ammo but I wouldn't know why a country would have two different loads if they chambered around in squad weapons and indiviual weapons. Sounds like a bad idea to me. None the less, my old Hakim gobbled up hundreds of rounds of that stuff and shot MOA with it.

Yeah, 2940 fps in surplus mil. ammo from Equador. I don't know how old it is, but corrosive and I got it for $89 / 1000 case price a few years ago.

I think it's a 195 or 200 gr. bullet.

Corrosive ammo is fine so long as you run a patch with a bit of DILUTE household ammonia through the bore.

DILUTE because full strength ammonia removes blue. Still, keep an eye on where it goes. Make sure you get the residue off the crown, bolt face, etc.

Of course the Turk is faster than the BRNO! Longer barrel. Longer barrels are always faster.