No, the luger action works just fine with 147 gr FMC - Magtech (sub-sonic). The YHM silencer has a Nielsen device (recoil booster) which acts as an inertial damper. Runs okay on my 1918 DWM 4" barreled P08 without any jams or misfires.
Here's the real reason I would NOT recommend suppressing a luger: they are loud. Much louder than the platform I regularly use, the Sig 229. Hardly worth the effort. There are heavy forces on the adapter and I have had the locking ring jump ship on occasion, although with no damage to the baffles. -- just the cool factor going for you here, but don't expect much in the sound reduction department. One additional point, with the original .30 cal adapters, they are spring loaded at the muzzle attachment point. That may help reduce the forces on the locking ring.
And, there is the little matter of the blue wear at the attachment point, something to consider.
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