A few years ago I set out to make a new out of the box Bulgarian Makarov malfunction within the first 1,000 rounds of Barnaul JHP and FMJ ammo.
The tests were "normal" problems that might happen, but carried to extreme.
All tests started with a full magazine, chambered round, hammer cocked.
The gun was not oiled or cleaned, unless you count when it was left under water for a day.
You draw your Makarov but you drop it in the mud.
You only have time to grab the gun and shake it one time before pulling the trigger.
The mud blocks the hammer on the single action trigger pull.
You immediately pull the trigger double action and the gun fires and you shoot the magazine dry.
Some people have a thing about pocket lint or a dirty gun malfunctioning.
I filled the inside of the dirty gun with "pocket lint".
No problem.
Your Makarov is a car gun that spends the cold winter in the car.
I over greased the gun and left it in the freezer.
The only problem was the gun was a little cold to shoot without gloves.
I did a number of other tests, in which the Makarov functioned perfectly.
There were two "malfunctions". The first when the mud blocked the hammer on the first trigger pull and a dud primer.
I finished up with a accuracy test, in which the limit to the accuracy was the shooter, not the gun.