Chronographed luger results

[JuneGrass 8]

Just read the thread on the discontinuing of SR4756 . I just acquired a 30 cal. Swiss 06 , and have been reading up on all the loads that show up on these forums . My question is , has anyone tried VV 3n37 ? I already have this for use in my 38 super , and would like to use it in the Luger if at all possible , Thanks Don

[Sieger]

Originally Posted by JuneGrass 8

Just read the thread on the discontinuing of SR4756 . I just acquired a 30 cal. Swiss 06 , and have been reading up on all the loads that show up on these forums . My question is , has anyone tried VV 3n37 ? I already have this for use in my 38 super , and would like to use it in the Luger if at all possible , Thanks Don

Hi,

Yes, I'd try it immediately!

I'd start with the VV Loading Guide with the lowest load listed for your bullet weight. Then, I'd start increasing the charge 1/10th of a grain until I just started activating the hold-open device on the last shot (single shot tests will do for this phase). If the VV Loading Guide's lowest load activates your hold-open device, then decrease your load until the hold-open will not activate and note your minimum load accordingly. This will act as your base load.

With your base load established, you can comfortably move up, with 1/10th grain increments, from there; carefully watching for either tight groups or pressure signs/pistol malfunctions. When the load is getting to hot, it starts to outrun the springs in your Luger and jams will occur. Stop increasing your load at any sign of pressure or malfunction, as overloading your Luger may case it serious damage (breach block slap)!

Critical to proper Luger function is cartridge O.A.L., so please read my Sticky on how to determine proper O.A.L.. For round nose bullets, the original DWM specs were 1.173 inches of O.A.L..

I've found this powder extremely accurate in my 9mm LP-08; in fact, its my most accurate in this pistol.

Try it, as it should be an excellent powder for the 7.65mm Luger!

Good shooting!


Sieger

[JuneGrass 8]

Sieger,
Thanks much , my instincts were leaning in the direction you outlined , but I have waited so long to purchase my Luger , and of course they haven`t gotten cheaper over time . Anyway , thank you again for leading me through my weak knee`d phase . There are not a lot of options in 7.65mm in the VV loading guide , but the 7.62X25 Tokarev is listed so I`ll use it`s listing`s , and press on with nothing but good intentions , and your good advice .
I look forward to our next get together . Don

[ChrisLL]

Originally Posted by Sieger

Hi,

Stop increasing your load at any sign of pressure or malfunction, as overloading your Luger may case it serious damage (breach block slap)!


Sieger

Great info Sieger, thanks. Could you define "breach block slap" please?

Chris

[ithacaartist]

Originally Posted by ChrisLL

Great info Sieger, thanks. Could you define "breach block slap" please?

Chris

Hi Chris,

"Breech Block Slap" is the occurrence of the breech block's "slapping" against the inside, rear of the grip frame when firing. If you purchase Gerard Henrotin's Luger Mechanical Function ebook, there is an informative section about it, and the evidence it leaves within the mechanism. It goes hand-in-hand with the marks left on the outside, rear of the frame, where the "duck tail" of the rear toggle bottoms at the back of the frame when the ammunition is too powerful.

[ChrisLL]

Originally Posted by ithacaartist

Hi Chris,

"Breech Block Slap" is the occurrence of the breech block's "slapping" against the inside, rear of the grip frame when firing. If you purchase Gerard Henrotin's Luger Mechanical Function ebook, there is an informative section about it, and the evidence it leaves within the mechanism. It goes hand-in-hand with the marks left on the outside, rear of the frame, where the "duck tail" of the rear toggle bottoms at the back of the frame when the ammunition is too powerful.

Thanks, that makes sense.

Chris