M57 Reloading (7.62x25)

[Mako275]

So I just my M57 about a week ago. Looking into reloading, but I can't seem to find a straight answer for 7.62x25. Small or large bullets, magnum powder, TT-33/M57 vs. CZ52, etc. Also the majority of data I can find is 10 years old or more.

I'm not looking to set accuracy records, just a safe load that's comparable to the PPU factory loads. I understand if you don't want to post recipes, but anything that could get me started would be great.

Information

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[Aussie48]

Have a look on this site

Load Data

Dick

[Mako275]

I've seen that site linked on other forums and that's where I got confused.

That site says to start 15% lower for TT-33 actions implying they are weaker. However in the replies after that site is linked a lot of people have failure to eject/feed.

Most of the time I find recipes for 7.62x25 they are for CZ52s.

That's why I wanted to ask if I use CZ52 data am I going to blow myself up or is it a lower charge which will result in failures?

[Eaglelord17]

You can also use 7.63x25 Mauser ammo loading data. 100% safe and it should work reliability.

[Outpost75]

Both the Czech and Russian pistol designs are entirely suitable for 7.62x25 loads at full MAP and are quite strong enough for any sensible load. CZ52, Tokarev and its Combloc copies are safe with military surplus and commercial ammunition, including the Czech Sellier & Bellot, which in my chronograph tests approaches 1700 fps fired in the Cz52 with 4.7-inch barrel and has a Pmax (sample average + 3 standard deviations) of 2800 bar (40,600 psi).

For a "safe" load which functions well in both the CZ52 and TT33 use Starline brass, Federal 200 primers and 5.3 grains of Alliant Bullseye with the .309" diameter Hornady XTP bullet at an overall cartridge length of 1.35", which approximates the 1380 +/- 30 fps velocity of USSR Type P Ball with a modern JHP bullet. The Norma .307" diameter 93-grain FMJRN can be safely substituted over this powder charge at an overall cartridge length of 1.38" for about 1350 fps. The Accurate 31-087B bullet which is designed for the 7.62x25 can be cast BHN16 (50-50 linotype and wheelweights) and sized to .310" can also be safely substituted and gives about 1400 fps.

All of the above loads are more accurate than milsurp ammunition in my several pistols.

The 5 grain Bullseye load listed by Lyman for the C96 Mauser pistol would NOT cycle my TT33 or CZ52 pistols, resulting in about 50% "smokestack" jams. The 5.3 grain charge of current Alliant product was the lightest which functioned reliably in both pistols in over 100 rounds, so I quit there.