I can't say I had any problems with my full size. Could just be getting broken in. If it's still throwing shells to your 5 or 6 'o'clock by time you get to 500 rounds something isn't right. Try a variety of ammo as well. Another thing you could try is leaving the slide locked back overnight to help it it get broken in. Or just pick up a Springer Precision guide rod and 1911 recoil spring and call it a day.


Sent from my iPhone using Tapatalk

 

Mine does the same thing with WWB 115gr ammo.

Puts all the empties in a neat little pile on the shooting table, so I don't have to look all over creation for them.

Reloaders appreciate little things like that.

But, in over 500 rounds my fullsize P320 9mm has never malfunctioned.
Not even with my crappy reloads.

 

How well does it function with a 124gr or some P+ ammo ?? Could be nothing more than a new heavy recoil spring and todays class of lite and weak ammo.

 

Yeh, only tried it with 115 gr so probably just a stiff recoil spring. Shoots really great. I plan to put a new spring and steel guide rod plus get trigger work done by Burke.

 

My brand new 9mm compact is doing the same thing. I had a pile of brass about 18" from my right foot and had plenty of rounds hit my right arm and hand, (I shoot left handed).

I'm shooting 115gr Blazer Brass till I run out. Had zero malfunctions but it's still concerning.

The gun feels phenomenal and shoots like a Lazer so I'm hoping its ammo related, and maybe a hotter round will have a more confidence inspiring ejection.

 

weak ammo, try others before changing the spring.

 

Shoot it a little more to break in the recoil spring.
Leaving the slide back does very, very, little, the spring is a contraction & expanding spring, ( works both ways. )

It's the actual usage that will soften it up.
+ it may be set up for full power loads.

Make sure to grease your rails and rail contact points.

 

From my understanding sig used the same recoil spring in the 9mm as they did in the 357/40 variants. I had the same issue with 115 gr rounds, but no issues with 124gr or 147gr. The issue has also lessened as I put more rounds through it.

 

Looking at the parts page there is only one recoil spring available for purchase, and that spring is for all carry, compact, and subcompact models. Seems odd to have the same spring cover 9mm, .40, and .357 and have that one spring cover two barrel lengths.

 

I could be mistaken but I think my 45 C uses the same one also.
If it's so, I don't know how they get away with it.

 

Maybe they use a tighter spring to compensate for the 40s and 45s and since it can handle that recoil, they use it for 9mm too? That would be my thought process lol