Chuck,
welcome to the board.
By all means try the 124 gr ammo, and another brand or two of 115 also.
Describe or show a picture of the "jam"- jams have several reasons for being and how they jam is a clue.
Be sure the pistol is well oiled and you are using a "stiff" hold.
And don't waste your time or money sending it to a "gunsmith". As noted above there are only one or two guys that can "fix" a luger in the US- JMHO. Anyone else is likely to do as much harm as good and cost you plenty to boot.
You can sort it out yourself.
Poor Sean Connery, I'll bet he tried to buy up all the pictures and copies of that film.
But everyone has to earn and start somewhere.
