Hi Warren,
Glad you discovered the joy of shooting a .30 cal. Luger. I have 2 shooter Lugers in that caliber and take them out more than my 9 mm shooters.
The "compactness" of the shooting experience with the .30 round is addictive.
BTW...I may be somewhat of a minority-voice here, but I do shoot a few rounds through each of my collector-grade Lugers I add to my collection.
Since I focus more on Swiss Luger in .30 cal/4-3/4" barrels, I put a few round through each gun that comes home before they get cleaned up and placed in storage.
Knock-on-wood...but I have not had a part break...
This outfit has .30 ammo by Fiocchi for $ 18/box of 50. Not cheap but better than $ 25-50/box :
http://www.sportsmansguide.com/cb/cb.asp?a=282665