Limit-Z 9mm ammo

[Palmaris]

Hello guys.
I need help to analyze couple of failures I have had yesterday at the range.
I was practicing with two of my handguns-9mm SA Loaded and CZ 9mm TS. While CZ was working with no issues, SA faced probably 6-7 light strikes. After second light strike, I looked carefuly and found piece of primer inside firing pin hole. Then it keeps repeating. That small piece was coming out easy from hole. I used Limit-Z ammo 9mm 124 grain. Bullets were flying straght. I had half a box of American Eagle 124 grain and that ammo was working with no problem. My guess is this Limit-Z is not the best for 1911 ( no issue with CZ). Or I have problem SA piercing primer?

[mooner760HD]

I have both pistols and have not had issues shooting American eagle or fiocchi

[JTROKS]

Is the Springfield Armory 1911 box stock or has it been customized/modified in any way from its’ factory configuration?

I’m assuming this Loaded model has the ILS and the Ti firing pin is still inside? What year did you buy this SA Loaded?

[Palmaris]

I replaced ILS with magwell and replaced front sight to FO, replaced barrel bushing with thicker from Wilson. The rest all stock.
I bought her about 2 years ago brand new.
I didn’t have any issues before I start usung LZ ammo. Next time I will take AE ammo and will check if I will face the same issue.

[JTROKS]

If you have the Titanium firing pin and and extra power mainspring that’s the culprit.

[Palmaris]

I have original mainspring and original firing pin. What should I replace-mainspring (I have 26# and 28# extra springs) or just put steel firing pin?
Will this firing pin work for my gun https://dawsonprecision.com/firing-p...son-precision/ ?
What is advantage of titanium firing pin?

[Palmaris]

Can you explain please physics behind this issue?

[JTROKS]

The ammo that you’re having problem with has softer primer cups than the other ammo that you’re not having problems with. The Ti FP due to its’ lighter weight bounces off the primer faster after ignition. As the pressure rises the softer primer cup is flowing into the firing pin hole. I’m sure there is more to it than just the Ti FP retracting into the FP hole faster than a steel counterpart, as in faster velocity of the Ti FP vs steel FP.

If you refrain from using the problem ammo then you’re problem is solved, but what happens when you encounter other ammo brand that uses the same soft primer?

[MrBlazito]

I have original mainspring and original firing pin. What should I replace-mainspring (I have 26# and 28# extra springs) or just put steel firing pin?
Will this firing pin work for my gun https://dawsonprecision.com/firing-p...son-precision/ ?
What is advantage of titanium firing pin?

The ammo?

[Joezamboni]

The ammo?

Seriously, what the heck is Limit Z ammo? Is the difference in modifying your firearm worth it, especially when your comparing it to federal ammunition that has known softer primers?

[JTROKS]

I have original mainspring and original firing pin. What should I replace-mainspring (I have 26# and 28# extra springs) or just put steel firing pin?
Will this firing pin work for my gun https://dawsonprecision.com/firing-p...son-precision/ ?
What is advantage of titanium firing pin?

The Ti FP only advantage I can think of is shorter lock time and the fact that it allows the SA 1911 to pass CA drop test. I got rid of my Ti FP from my SA 1911s and replaced them with Dawson small diameter extended length and a 17 or 19 lb mainspring. Be advised that my 1911s with the extended FP and decreased power mainspring are used mainly for range, target and competition. If you use your pistol for defense I don’t advise the extended FP and mainspring no lower than 21 lb.

Also, my theory is just an honest assessment of what could be happening. It’s hard to pinpoint exactly the problem because I don’t have the actual problem gun and ammo, not exactly shooting it at the range either. The primer cup might be improperly annealed causing brittleness. The higher velocity of the Ti FP strike could be causing fractures in the primer cup and being shot into the FP hole during pressure spike.

My guess is if you switch to the steel FP and a 21 lb mainspring will solve your problem with that ammo.

[Palmaris]

Thank you sir for info. I will keep it in mind. I will try again with different ammo and if gun has no issue, I will keep as is, if problem persists-I will replace firing pin.

[Palmaris]

Seriously, what the heck is Limit Z ammo? Is the difference in modifying your firearm worth it, especially when your comparing it to federal ammunition that has known softer primers?

It is Czech ammo I bought from United Nations Ammo. Price was good and it is factory new. Ammo itself is very good, very consistent and accurate. Also pretty clean. It works fine on CZ TS and other guns. I have left only 100 rds, so will not buy any more.

[Palmaris]

Just ordered FP from Dawwon.
Do I need to replace mainspring if I change FP? I have original now.

[Saym14]

Can you explain please physics behind this issue?

lighter pin has less momentum