only issue i've had with that stuff is inconsistent powder/power.
1st case worked fine in the norc m14s.
2nd case had regular FTE. Wasnt the rifle as using other ammo like SA surplus or match reloads for bolt guns worked fine.
Have you weighed the powder charge from those cartridges??
I broke down a hundred of them to weigh the components. All of the powder charges were within a few tenths of a grain of each other as were the bullets.
Not bad at all for factory FMJ ammo, loaded to milspec standards.
The cartridges I did the test on were from two different batches, a few years apart.
The reall problem was IMHO inconsistent "neck tension"
Some of the projectiles were very difficult to dislodge with an inertia puller and required several more whacks onto the lead block I use as an impact surface.
To me, this indicates a weld has formed from the initial tension imposed during loading and prolonged storage while under tension.
I reloaded all of the components into the BERDAN primed cases, without removing or replacing any of the primers.
Velocities from a 22 inch, bolt action rifle were very consistent, around 2700 fps, if memory serves.
When I'm using surplus ammo, in any of my rifles that accuracy is important, I run all of the cartridges through a press and push the bullets into the case appx .005 inches to break the tension weld. This has helped a lot with inconsitent velocities and accuracy is much better.
Ganderite turned me onto the "neck weld" issue a while back and it's proven to be an invaluable bit of information, that for some reason went over my head for to many decades.
I do the same thing with any left over ammo from a batch loaded for a hunting season.
