147 grain 9mmP standard pressure ammo has a notorius reputation for not cycling in many 9mmP handguns such as Glocks, CZ-75's, and others. The pressure curve for the 147 grain ammo is very different from 115 grain or 124 grain ammo. Due to the much more limited powder capacity of the case when loaded with a 147 grain bullet, faster powder is used, which gives a much shorter pressure pulse (The bullet has to be seated so deeply to maintain an overall loaded length within cartridge specifications, that is significantly reduces powder capacity.).
Given the stiffeness of the Luger action, I'm not suprised that the 147 grain load didn't cycle in your Luger. I would try some standard 115 grain or 124 grain full metal jacket ammo, like the Winchester 115 grain white box available cheaply from Wally World and see if functions with that.
I have had functioning problems with 147 grain 9mmP ammo in several of my none-Luger handguns (Never tried it in a Luger.) and consider it basically to be junk. It takes the great 9mmP cartridge and turns it into a mediocre equivilent of a 38 special. The german military knew what it was doing when they loaded the 9mm with 115 and 124 grain bullets.
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