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Oak Leaves with Clusters Member
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I've been enjoying shooting three kinds of surplus ammo in my Romanian TT and decided to chronograph my ammo to see the power and variation. Chrony F1 at 5' from muzzle. Chrony recommends strings of 10 shots but this is all I could get done for now.

Romania 22 over 85 headstamp
Average of 5 shots, 1421 fps Max 1458 Min 1416

Polish 343 33 53 headstamp
Average of 14 shots, 1396 fps Max 1473 Min 1361

Bulgaria 10 over 53 headstamp
Average of 5 shots, 1422 fps Max 1461 Min 1382

As you can see from the fps, one is not a whole lot "hotter" than the other.

Since I had some Privi Partisan for my C96 broomhandle in 30 Mauser, I fired it in the TT. Average of 5 shots 1230 fps Max 1238 Min 1217

I read that the TOK and 30 Mauser ammo, while alike in shape and size, are quite different in loadings and the Mausers should never use the "hotter" TOK ammo. There does not seem to be as much difference as I expected but I will still baby my 1911 C96 with the correct ammo.
 

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Copper Bullet member
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It is a widely held, but not necessarily true, belief that 7.62 Tokarev ammo is always way hotter than 7.63 Mauser. If you found some relatively fresh pre-WWII German or Czech 7.63 Mauser ammo to try, I wouldn't be surprised to hear that it chrono'd even higher than the post-war Tokarev rounds you tried.
 

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Running the calculation thru QuickLoads, assuming 85g Sierra #8005 and Power Pistol, 4.5 in barrel

1230 fps requires 6.65g powder, and makes 20,400 psi
1422 fps requirea 8.1g powder, and makes 31,200 psi
I would think that is not an insignificant difference

Of course one could use different powders and bullets, but the difference in velocity will require comparable difference in pressure.Your validation of the comparability of various TT-33 loads is much appreciated, eliminates much mythology floating about.
 

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Gold Bullet Member and Noted Curmudgeon
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No sure where Frank got his data, but he shows (CotW) 7.63/.30 Mauser factory load as developing 1410 fps, while the parent 7.65 (30) Borchardt made 1280 fps. He gives7.62x25 Russian Tokarev as 1390 fps in service loading.

As we know, those aren't the numbers that are generally seen across chronographs in today's world. Wish Frank was alive to discuss the matter with - might learn something interesting. Or not...
 

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I've always wondered where the myth came from. The same myth exists for 308 Win and 7.62 NATO, but it was a misunderstanding of C.U.P. and PSI. I wrote a white paper dispelling the rifle round myth a couple of years ago, but there never was any official source like the US Army that claimed pressure differentials. In fact, the Soviet publications I have seen clearly state that the two rounds are interchangeable, as does Jane's Infantry Weapons. There are minor - very minor, as in it cannot be detected by the human eye - differences in the external dimensions of the two rounds, and I use both in my M30.
 

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Wolf Gold 86 FMJ & HP runs 1400-1410 from my Pole.

Sellier & Bellot FMJ went 1550 from a CZ52 I owned.

Thanks for posting your results nwellons.
 
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