Jal, super job on the P.38!
My Walther expert told me, after I brought my own P.38 to him because of cycling issues with 115 gr luger, that I should use 124 gr instead. He made his point by loading 8 of those rounds in my pistol, taking it out back, and ripping off 8 shots in a row as fast as he could pull the trigger. I took it to the range and got 1 or two jams on each mag with 115gr, and zero out of 100 jams with 124 gr
I have also replaced all my springs- even the mag spring. A warped mag spring can influence how the rounds feed