Feeding question

mrerick · 11-29-2013, 09:13 AM

It's possible that someone has replaced the recoil spring with one that is powered to handle 9mm ammo. IIRC, there are fewer coils on the ones used with .30 Luger.

If you get a chance, carefully remove the grips (be quite careful about not breaking the left one up at the safety lever), and count the coils on the spring...

Marc

rhuff · 11-29-2013, 03:36 PM

As far as I know, in USA, there are only two(2) types of 30 Luger available(commercial ammo) (1) Fiocchi (2) Winchester. The muzzle velocities are almost identical to each other. Most folks with 30 Lugers have no problems with Fiocchi ammo. Are your Fiocchi cartridges FMJ, or JSP? My 30 lugers do not like the JSP bullet in the Fiocchi ammo.

Your Luger may well be "short stroking" due to a mainspring that is too stout for the ammo. Your mags do not appear to be the problem. Luger is clean and lubed, so that is ruled out. What does the feed ramps on the frame and barrel look like....smooth, or rough with horizontal machining marks?

My first choice would be to purchase the two(2) Luger mainspring weights that Wolff Springs offers and give them a try. They are inexpensive, and could be your problem

11-29-2013, 09:13 AM	#1
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,925 Thanks: 1,377 Thanked 3,140 Times in 1,520 Posts	It's possible that someone has replaced the recoil spring with one that is powered to handle 9mm ammo. IIRC, there are fewer coils on the ones used with .30 Luger. If you get a chance, carefully remove the grips (be quite careful about not breaking the left one up at the safety lever), and count the coils on the spring... Marc __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.

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11-29-2013, 03:36 PM	#2
rhuff Patron LugerForum Patron Join Date: Mar 2011 Location: Az. Posts: 2,315 Thanks: 2,753 Thanked 999 Times in 734 Posts	As far as I know, in USA, there are only two(2) types of 30 Luger available(commercial ammo) (1) Fiocchi (2) Winchester. The muzzle velocities are almost identical to each other. Most folks with 30 Lugers have no problems with Fiocchi ammo. Are your Fiocchi cartridges FMJ, or JSP? My 30 lugers do not like the JSP bullet in the Fiocchi ammo. Your Luger may well be "short stroking" due to a mainspring that is too stout for the ammo. Your mags do not appear to be the problem. Luger is clean and lubed, so that is ruled out. What does the feed ramps on the frame and barrel look like....smooth, or rough with horizontal machining marks? My first choice would be to purchase the two(2) Luger mainspring weights that Wolff Springs offers and give them a try. They are inexpensive, and could be your problem