This may not be the exact answer you wer ehoping for but.. :
While I dont know enough about that particular firearm ( and especially WHEN in the war it was made) I am not sure for what reason I would want to shoot +P aka 9mm "proof" load in a classic firearms?
If it was SHTF and a MZB is in my room and thats all I have sure..
But pre boom, why not just use regular 9mm?