I bet I know exactly what happened. The first ammo you bought was made in India in the 1970s. The second ammo you bought was made in the 1990s. Check your headstamps, you'll find it to be true. The stuff made in the 70s is good stuff, and known to be so. It's packed on 5-round stripper clips in bandoleers.
The 1990s stuff is known to be complete crap and is usually packed loose or in 10-round blister packs. It is known to have a widely varying range of charge weights, but it all "looks" decent. It had such a bad rep that J&G Sales was selling it for $99/1000 and few bought it. The best thing to do with the 1990s Indian ammo, if you're stuck with it, is to pull the bullets, discard the powder, charge with your own powder, and re-seat the bullets.
Trust me, the Indian 7.62 ammo has not had a good reputation. I've been buying surplus ammo for many years and I would not buy it or the Turk 8mm. Well, I have a friend who wants to sell me 1300 rounds of the 8mm Turk, but I wouldn't give him what he paid for it some years ago...
I've actually been pretty happy with the Turk 8mm that I've used. A lot of it has split necks, so you have to inspect it, but what doesn't have split necks is just fine. What did have split necks, I pulled the bullets (by hand, they were that bad), dumped the powder into primed, commercial brass, then seated the Turkish bullets into that brass. I didn't think to weigh the powder from the cases, but I didn't blow myself up in the process, and it was as accurate (if not moreso) than the original ammo, plus it was non-corrosive at that point thanks to the new, commercial primer.