Marstar Czech 7.62X25 ???
- Thread starter 4b1t
- Start date
(((Echo)))
CGN frequent flyer
- Location
- Old Man Land, AB
Have a crate. Good stuff. Like Helno, ~1500 fps. Fun to plink with.
I have no idea about corrosive, but I did have one problem with mine. I had a major hard extraction one day.
Hadn't cleaned the pistol from the last outing
and was blazing away on this one. One round decided not to play nice. Round went bang, slide cycled but the case remained in the chamber 
. The hard extraction drills at black badge didn't help. Naturally, no squib rod with me . Back home, I put the rod down the barrel and had to drive out the case. A very thorough cleaning and inspection followed. No damage that I can see . The only thing I can figure is that the laquer built up in the chamber and seized the case.
(E)
I have no idea about corrosive, but I did have one problem with mine. I had a major hard extraction one day.
Hadn't cleaned the pistol from the last outing
and was blazing away on this one. One round decided not to play nice. Round went bang, slide cycled but the case remained in the chamber . The hard extraction drills at black badge didn't help. Naturally, no squib rod with me . Back home, I put the rod down the barrel and had to drive out the case. A very thorough cleaning and inspection followed. No damage that I can see . The only thing I can figure is that the laquer built up in the chamber and seized the case. (E)
(((Echo))) said:Have a crate. Good stuff. Like Helno, ~1500 fps. Fun to plink with.
I have no idea about corrosive, but I did have one problem with mine. I had a major hard extraction one day.
Hadn't cleaned the pistol from the last outing
(E)
Yep. Indeed, laquer built up would cause problem. After 200 rds of that ammo my Tok just decided not to chamber anymore. So, after proper cleaning everything went back to normal. And also, this ammo seem to be cleaner than Norinco stuff...
I would say it is non corrosive because the steel cases that I kept from 9 months ago when I first shot the gun dont have a spot of rust on them. I have left the gun for periods after shooting it and have not seen any sign of corrosion after several weeks.
On the other hand shooting marstar 7.62x54r I noticed that the cases had signs of rust in the after less than a week.
On the other hand shooting marstar 7.62x54r I noticed that the cases had signs of rust in the after less than a week.
Yes, it does look like that. If you go far enough back, John from Marstar (which offered the Tok + Czech 7.62 deal) quotes extensive velocity and pressure testing showing that it is safe to fire the ammo through the Norinco Tokarev.
ALECHS;
Please take the time to review our long ago published data on this ammo, I think it will answer all of your questions.
By the way, maybe one reason the Americans get a little annoyed with this ammo is because they cannot import it....
John
Please take the time to review our long ago published data on this ammo, I think it will answer all of your questions.
By the way, maybe one reason the Americans get a little annoyed with this ammo is because they cannot import it....
John
I looked in the CGN archives and Marstar's testing may be too far back to find...from Wikipedia:
"The Vz-52 fires a particularly hot loading of the 7.62 x 25 mm TT cartridge developed in Czechoslovakia, designated M48. It is often referred to simply as "The Czech Load". This is an 85 grain (5.5 g) FMJ bullet fired at 1,640 ft/s (500 m/s), 18% faster than the stated velocity of the common Russian load. The Czech load gives both unusually flat trajectory and relatively high penetrative power for a handgun. However, while certainly deadly, the small-caliber, full metal jacket bullet may overpenetrate and transfer only a fraction of its considerable energy to the target. This may also represent a hazard to bystanders, both those beyond the intended target and on the far side of intervening walls and doors."
"The Vz-52 fires a particularly hot loading of the 7.62 x 25 mm TT cartridge developed in Czechoslovakia, designated M48. It is often referred to simply as "The Czech Load". This is an 85 grain (5.5 g) FMJ bullet fired at 1,640 ft/s (500 m/s), 18% faster than the stated velocity of the common Russian load. The Czech load gives both unusually flat trajectory and relatively high penetrative power for a handgun. However, while certainly deadly, the small-caliber, full metal jacket bullet may overpenetrate and transfer only a fraction of its considerable energy to the target. This may also represent a hazard to bystanders, both those beyond the intended target and on the far side of intervening walls and doors."
As far as testing for corrosive primers, pull a bullet and dump the powder charge. Take a piece of mild steel plate, and clean it (both sides) with steel wool and wipe it with alcohol to degrease the surface.
Chamber the primer only case, and fire the gun at the plate with the muzzle at a 45 degree angle, nearly touching the plate. the idea is to pepper the surface of the plate with the burnt primer residue.
Take a piece of chalk and circle the area peppered. Leave the plate for 1-2-3 days and see if the fired side grows corrosion faster than the clean side.
Also keep in mind that the Soviet lacquered steel cases are more tolerant of residual acid in the powder, so it's possible to find non-corosive primers but mildly corrosive ammo.
Chamber the primer only case, and fire the gun at the plate with the muzzle at a 45 degree angle, nearly touching the plate. the idea is to pepper the surface of the plate with the burnt primer residue.
Take a piece of chalk and circle the area peppered. Leave the plate for 1-2-3 days and see if the fired side grows corrosion faster than the clean side.
Also keep in mind that the Soviet lacquered steel cases are more tolerant of residual acid in the powder, so it's possible to find non-corosive primers but mildly corrosive ammo.
