For many years the 7.62 X 25 ammo was impossible to find. These guns were often re chambered to the .30 Mauser. Most guns will fire either round. They can have misfires because of the head space. Try firing some .30 Mauser it may work OK.
I soaked the pistol in varsol again, and also re lubricated. Will be a bit until I get to the range again but I will just have to go from there. Stopped by a local gunsmith and he had nothing in stock. Might check online.
Finally got to the range today and fired almost 200 rounds without any issue, guess I just had to clean it better. Glad it's working fine now. Thanks for all the help. Can't wait to get out and shoot it again!