? for those who load all 19 rds in P09

[joedirt199]

Anyone else feel like that 19th round is putting a lot of stress on the feed lips of the mag and could cause it to prematurly crack? Also makes for an almost impossible reload on a closed slide with a full mag. Does it get any better over time as the mags break in?

[fordemti]

It is tight but gets better with use. Or so I've noticed.

[M1A4ME]

Mine have 19 in them.  CZ advertises it as a 19 round magazine.  I'm taking their word for it and expecting their engineering and fabrication processes to supply effective and reliable equipment.

[Tobuk]

The 15th round is pretty tight in my P-07, way more so than a full mag in my SP-01. I trust it to hold up alright.

[muggia59]

I have had my P07 and P09 for about 3 years now. 5 magazines for each, and 2 magazines for each are always loaded. They have had no issues. When chambering a round though, I always start with slide locked back. I feel that with the rounds so tight in the magazine, if I force the full magazine on a closed slide, I am putting undo pressure on the rounds, and I don't want any round deformation. Just my opinion. My P07 holds 16 and I have always said that CZ crammed one to many in there.

[joedirt199]

Loaded all 6 of my mags full and let them set for a while to loosen up some. Haven't tried the 07 mags yet. Bought the 16 rounders so we will see if they get 16 or 15.

[CZTom]

I keep only 18 in my P-09 mags, for long term storage and loaded pistol.  I read somewhere, perhaps on this forum, that WWII Colt1911 type 45, 7 round ammo mags were found in the fully loaded (7 rounds) condition, in storage since WWII.  They were inserted in service Colt 45 and all that were tested functioned perfectly.  Since then, as we know now manufacturers are competing against each other, for better claims.  The same 1911 can now magically hold 8 rounds (same mag dimensions, better springs??), but will it function perfectly after being stored that way for 60 years, or 50, or 10, or 5, or

For me, I would rather "download" a mag or pistol by one round, and call it an emotional "comfort" factor for long term "stored and loaded" firearms and mags.  I have never been in an actual gunfight, but I am not sure that 19 verses 18 rounds in the first mag will make that much difference, as compared to knowing that the mag will work as expected if I really need it.  Just my thoughts.

[djcantr]

I load 19 and don't worry about it.  Sure, it's a little easier to seat a mag with 18 in it with a closed slide but it doesn't take a gorilla to seat one with 19.  I usually even chamber one and then top off the mag so I have 19+1 when I put it in my bedside pistol safe.  I don't think it will do any harm to the mags. 

[Quad50mg]

I got to frustrated trying to load the 19 rounds. I gave it up and just load 18 .
It ticks me off though, One of the reasons I bought the p09 was to get the full load of 19 in the Mag.
Maybe a Lula loader will help ?

[oldRed]

I usually load magazines one round light. It seems like most of my FTFs come on the second round or a full magazine. I think the second round is drug out just a little every once in a while causing problem with ejection. It's rare enough I can't describe if very well. It may be my imagination.

Red

[wdbutcher]

I've never had any luck getting a 19th round in either magazines for my P-09. I choose to go with 18 rounds rather than use more pressure than seems safe to insert the 19th round.
BTW, I've put over 500 rounds through my P-09 since I bought it used and have never had a single hiccup

[regular_guy]

I load all my P09 mags to capacity. No issues in a couple thousand rounds.

[Glocky_Balboa]

Loaded all 6 of my mags full and let them set for a while to loosen up some. Haven't tried the 07 mags yet. Bought the 16 rounders so we will see if they get 16 or 15.

I can save you some time.  You'd have to wait years to notice any loosening up that way.  Higher quality springs don't work that way.  There is no change to the springs in a static position, and if they're well made, without shortening and lengthening they'll hold their spring weight for a long long time.  To loosen up a recoil spring (a little ) for instance, rack the slide a few hundred times.  Locking back the slide won't do anything.  Taking something to push the follower down a few hundred times will do more than keeping the magazines loaded.

[Glocky_Balboa]

Here's a quote I found in a physics forum on the same topic.

"The phenomenon known as creep, as mentioned above, only affects materials at or above ~0.4x their melting point, in absolute temperature (kelvin). This is unlikely to be an issue in regular service unless your springs are made of something absurd like lead, which actually creeps are room temperature. (I am assuming the temperature increases as a result of firing the weapon are small) Stress-strain cycles, on the other hand, play a major role in spring wear. Ferrous material like iron and most steels exhibit an infinite lifetime under a particular amount of stress amplitude - not the absolute stress, which is generally far less - (the so-called "fatigue limit"). Less ductile materials like aluminum and titanium have a finite cycle life regardless of the stress amplitude; however, parts designed with these materials generally have lifetimes in the millions of cycles and fail by different modes long before the lifetime is reached.

So obviously, the life of the spring depends on proper design and materials choice. The spring steel that your gun would most likely use is a moderately-high carbon steel, with potentially nickel, silicon and manganese alloying agents in small quantities. Properly designed, it would last far longer than the other components of the gun that are regularly undergoing thermal stress, diffusion, and much larger fatigue cycles. It's safe to say that storing your mag in a properly designed gun, will not wear out the spring prematurely."

Reference https://www.physicsforums.com/threads/does-static-tension-wear-out-a-spring.661309/

[M1A4ME]

That's what every one says, but I've bought enough new magazines (the double stack jobs are always worse to load than the 1911 magazines) in the last 5 or 6 years that I've found out loading them up (with the lula loader) and letting them sit in the cabinet for a few weeks makes it much easier for me to load them back up by hand if I forget the lula, or just don't want to go get it this one time.

I just got 5 new CZ 75 magazines in the mail Friday.  Sat right down and started loading them up.  Got to that last round and made my thumb sore trying to force that last round in the 14 shot magazines.  Finally gave up and got the lula out and finished loading up all five magazines. 

That was Friday night.  Last night I got the magazines, and pistol, out of the cabinet and field stripped the pistol to check some bullets out (chamber fit/plunk test).  I removed a couple of the bullets from a magazine (removed one, got up to check the clothes dryer and left the round in my hand on the washer and couldn't figure out what I did with it till later, so I had to remove another one).  When I got done I loaded the magazine back up, without the lula loader, with no problem.  Then I inserted the magazine, chambered a round, removed the magazine and inserted another round to bring it back up to 14 in the magazine.  Again, loaded that last round with my thumb.

I haven't tested the amount of pressure required to insert the last couple of rounds in any magazine, I just know, from the experience of loading many Glock, XDM, M&P, CZ, Browning and PA14 magazines over the last few years that there is a difference over time and leaving them fully loaded makes them easier to load to capacity.  I never let a new magazine sit around in the wrapper (pistol magazine - 30 round AR15 magazines don't seem hard to fully load at all, so I leave them new in the wrapper unless I need them).

Science is great.  Show me a test machine with a flesh and bone thumb that is forcing rounds down into a 19 round pistol magazine over and over.