I purchased 4 boxes of Prvi Partizan 9mm Luger Subsonic Ammo 158. Will there be any issues shooting this through my guns? Cz sp01, cz shadow, walther ppq q5? 

 

There should be no problems with pressure or functioning in your Walther.  The only surefire way to find out is to shoot some.

Technically 147gr 9mm is usually subsonic out of a 5" or shorter barrel.  

5 minutes ago, Krdshrk said:

Technically 147gr 9mm is usually subsonic out of a 5" or shorter barrel.  

Every subsonic I tested through the about 9" barrel of a MP5 or PCC stayed subsonic through a chronograph.  Most PCCs lost some velocity compared to firing through a pistol.  My guess is the powder is consumed and barrel friction comes into play.

Whats the velocity?

33 minutes ago, Golf battery said:

Whats the velocity?

950 fps

 Meets power factor. I think even for pcc at carbine.  If not.  Very close at 115 gr. Ouch.  Far from pf.  Like 20 off