I was left this RJ marked PP from a family friend upon his passing. Sent it to Earl because the gun had not been fired since it was brought to the US in 1945. Earl replaced the springs, cleaning and lube and made a plug for the missing lanyard loop. Gun worked flawlessly when I got it back. Now it won’t chamber the first round , stovepipe when I rack the slide. This has started after putting about 60/70 rounds through it with no issues. Suggestions ?