Yugo SKS: do Chinese firing pins do better with Tula ammo?

The extra details about pierced/popped primers can be found at SKSboards, General Topics. I've read a lot about these issues, and a few people are aware that Yugo rifles were designed to operate with the harder Yugo primers etc. Whether Yugo bolts' pin holes are larger than on Chinese bolts, no idea.

To sum it up, in one rifle the firing pin remained within the firing pin channel's normal limits.
In the other M59, the firing pin was pushed out the rear of the bolt.
All parts are matching in both rifles and exc. condition.

All of this ammo was new Tula from both Walmart and Academy.
In my common Chinese SKS, only Wolf/Monarch was used and with over 3,000rds., there were no popped primers.

Thanks very much.
These two firing pins feel very smooth when rotating between fingers. The tips feel both round and smooth. These guns had little wear, as I stated, with all metal parts in exc. condition, and not even the slightest trace of pin hole 'cratering'. A couple of guys at SKSboards posted clear, magnified pictures of their firing pins, and one stated that max. pin protrusion is .060", with no pierced primers throughout many rounds.

Today I used 80-100 rds. of modern Wolf in one of these Yugos, with good results.
Ironically, when both Yugos were acquired in December about 120 rds. of Tula fmj (Wally or Academy source) were used in each, and both had several light primer strikes, but no pierced/popped primers until a few days ago. If by chance the replacement Chinese pins work as well as an original did in my nice (former) Chinese SKS, maybe no more problems. It used lots of Tula.

Maybe the common Chinese firing pin Holes are the exact same diameter as in Yugos?

As a last back-up plan, Murray's (in Texas) does professional chamber reaming for a modest price, shipped to your door. SKS worked on by them suffered no more popped primers. They also sell firing pin springs to help avoid slam-fires. Springs were installed by Russians in the original Russian SKS firing pin series, but for some strange reason dropped in all later productions.

Are primers used in Wolf ammo somehow actually different than those used by Tula (7.62x39)?