Best surplus ammo for cz-52 (7.62x25)?

Czech loads (often identified as "M48") are supposed to be the hottest. However, Winchester (which in this case is just repackaged Sellier & Belloit) and Prvi Partizan both equal this, firing an 85 grain bullet at around 1600-1650 fps. I was able to find the Prvi for about $15 per 50 at my local gun show.
 
I've shot two cans (roughly 2,400 rounds) of the Romanian so far with pretty good results.

I've had bad luck with the Bulgarian and Czech. Primer blowouts were the main problem. The Czech I had was 50's vintage, can't recall what age the Bulgo was exactly, but it was early cold-war also.

The Bulgarian may have been worse than usual as the can I got had the seals compromised, probably ages ago. The dinky little paper wrappers had degraded into purple and tan wood-pulp, and the ammo was discolored. Smelled like chemical eggfarts when fired. Horrendous. It will choke you out if you get a lungfull. The other commie 7.62x25 smells terrible also, but that Bulgarian will clear an indoor range in a hurry.:D
 
Ive just ran 10 brands thru the chrono

high of 1650 low of 585

thats way to much difference for me.

We are ripping apart the surplus ammo and re powdering it all
 
Ive just ran 10 brands thru the chrono

high of 1650 low of 585
Click to expand...

Within the same brands, or across brands (countries)?

It's pretty well-known that the rounds vary by country/year/brand, as the round has a commercial loading, military loading, hot loading, and a machine-gun loading, although I doubt you had any of that. If it was within the same brand, box, or can, then you have a point.
 
The Romanian stuff from Aim has been great for me. I'm on my 4th big can now. The primers may be a little hard sometimes so I put a tiny 5 cent washer under the hammer spring as a spacer and have had nmisfires in the last 3000+ rounds.
 
Within the same brands, or across brands (countries)?
Click to expand...

Balgarian was the worse having highs in the 1500s and lows in the 500s

Romanian mil surp not far behind 1500-800s

The Chicom stuff was 1100-800


S&P old lots (70s dated) 1650-1100

S&P new lots (90s dated) 1650-1450

I prefer no more than 100 fps vary.

All of my 7.62x39 is way inside of 100fps.

With a little bit of work we can pull down all the S&P, repowder it to AA #9 and get 1650-1700fps all day long.

We are going to pull down the commie milsurp, keep the projectiles and junk the rest.

Then reload the S&P with the commie projectiles for fun, and home cast wad cutters for business.
 
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