[DonVoigt]

I suspect GT meant its effect on operation of the mechanism.

GT,
before you disperse your barrels, how about weighing them.
I'll weigh the baby and post when it gets here - starting a new thread.

Either with or without the receiver is ok, I can subtract an average receiver weight to get to bbl weight.

I've been weighing .30 barrels of different lengths and profiles related to the carbine project, will post the info in a "barrel weight" thread.

Weight of the recoiling mass has a direct impact on function of the luger, "velly interesting" sorting through what works and what does not.