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unspellable · 08-23-2002, 09:53 AM

Jerry,

Unfortunately this idea does not wash. The issue came up previously and there was a thread concerning it. I was running experiments to find the weakest usable recoil spring. The spring must store enough energy to properly carry out the loading operation, this sets a lower limit, and correspondingly, a lower limit on the load used.

With the weakest spring tried, the action occasionally stopped in just the position you are referring to. This raised the question of whether or not it could be fired so I loaded a few primed cases with the action in such a position and pulled the trigger. The Luger will definitely go bang! The amount of brass exposed is academic since the action is not locked and you are already headed for disaster.

This is a hazard to be watched for at any time, but especially if you are playing with soft recoil springs.

Sort of illustrates the difference between experiment and hot stove debates.

The bit about the firing pin retainer hitting the frame came from the electronic Luger book, I don't have it here with me at the office to quote the exact title and author, but I presume we are talking about the same one.

My project arose from the question of what to feed a 7.65 Luger. Factory ammo ain't it. The project seems to keep expanding and begins to look like it will add up to a small book by the time I am done with it. But it will be nice to have some hard numbers on what to feed a Luger and what to have for a recoil spring instead of a lot of conjecture. I am actually measuring recoil spring strength, muzzle velocity, bore diameter, etc., etc.

One fact for preliminary release: You cannot measure muzzle velocity and attempt serious target shooting at the same time. By the time I get the bullet trap lined up on the target I am invariably shooting from some awkward position that is not conducive to accuracy. And the primary point is to launch the bullet in line with the trap rather than the bull's eye. If I had a backyard range I could probably solve this problem, but I am running to the range with a car load of junk and trying to set up a tripod on uneven ground.

08-23-2002, 09:53 AM	#70
unspellable User Join Date: Jun 2002 Location: Iowa Posts: 768 Thanks: 0 Thanked 19 Times in 11 Posts	Jerry, Unfortunately this idea does not wash. The issue came up previously and there was a thread concerning it. I was running experiments to find the weakest usable recoil spring. The spring must store enough energy to properly carry out the loading operation, this sets a lower limit, and correspondingly, a lower limit on the load used. With the weakest spring tried, the action occasionally stopped in just the position you are referring to. This raised the question of whether or not it could be fired so I loaded a few primed cases with the action in such a position and pulled the trigger. The Luger will definitely go bang! The amount of brass exposed is academic since the action is not locked and you are already headed for disaster. This is a hazard to be watched for at any time, but especially if you are playing with soft recoil springs. Sort of illustrates the difference between experiment and hot stove debates. The bit about the firing pin retainer hitting the frame came from the electronic Luger book, I don't have it here with me at the office to quote the exact title and author, but I presume we are talking about the same one. My project arose from the question of what to feed a 7.65 Luger. Factory ammo ain't it. The project seems to keep expanding and begins to look like it will add up to a small book by the time I am done with it. But it will be nice to have some hard numbers on what to feed a Luger and what to have for a recoil spring instead of a lot of conjecture. I am actually measuring recoil spring strength, muzzle velocity, bore diameter, etc., etc. One fact for preliminary release: You cannot measure muzzle velocity and attempt serious target shooting at the same time. By the time I get the bullet trap lined up on the target I am invariably shooting from some awkward position that is not conducive to accuracy. And the primary point is to launch the bullet in line with the trap rather than the bull's eye. If I had a backyard range I could probably solve this problem, but I am running to the range with a car load of junk and trying to set up a tripod on uneven ground.