1st time reloading 9mm question

[five.five-six]

The deeper the bullet is seated, the higher the pressure.


You need to check your OAL before and after it has been chambered. If OAL changes, you need to figure out why.

[JoyfulJoker]

If the throat of his barrel is too short, wouldn’t that render it unable to fire factory ammo? If it fires factory ammo, then wouldn’t that mean the problem is with his reload?

[J-cat]

I had the exact same issue. Even took it to someone who makes ammo for a living...he could not tell me what it was... after I did a quick google search I realized what was going on.. Google "CZ SHORT THROAT" multiple threads will come up. I'm glad I'm able to tell you from experience and save you a headache, CZ is very good only took 5 weeks turn around time lol

[five.five-six]

[bigbossman]

lol

[ysr_racer]

In familiar with the "too short" syndrome

[robledor]

Trust me.. the solution was a shorter AOL like all you guys suggested..... but I wasn't happy with that so I did more research. Don't laugh at him you guys are suggesting the same wrong idea. Plus he only looked at it for like 1 hours. OP try putting your bullets in other 9mm gun that is not a CZ. it will work

[Woodythedog]

Hi..OP here. Thanks for all your replies. I will try some of the ideas later today and get back to you all......
G

[Bastard]

I haven't read this whole thread but 1.142 is well within spec for 9mm.

what bullet are you using?
have you had any problems with this gun before using factory ammo?
what is COAL of the factory ammo that you have used - I usually load to the ogive but, unfortunately, that number is never given and must be extrapolated yourself.
have you measured the barrel throat, what is the max distance to the L/G?
you need to figure out the answers before you go any further...

you did the right thing by stopping and asking. there is a learning curve, don't get discouraged/frustrated you will figure this out...

[Sticky01]

I have an sp 01 and I need to load at 1.10 oal
one thing to remember is that different bullet profiles will also effect you oal
bigtime,
some bullets I need to set my oal at 1.05, I did not notice what bullet you are loading can you post your load recipe and components used it might be easier to help you.
changing min oal will effect pressure and can be dangerous but bullet profile can change oal but not pressure
example
a xtp bullet is at 1.05 oal if I remember right but a fmj RN might be at
1.35 or so but the case volume will be the same it is the profile that has changed ,

[newbie1234]

Tell you the true, when I first reload I did not know what OAL to set so I just take one NEW manufacture round and used that OAL. it's simple.

[srt4242]

I ran into the same problem with my SP01. 9mm reloads that worked in every other 9mm pistol and rifle I own, would not function in my CZ, I bought a lee factory crimp die, and the problem went away. Not saying that will help you, but the 3 SP01's in my family all required the factory crimp die for reloads. 1000's of rounds later, still flawless.

[Woodythedog]

OP here....I finished my first 50 rounds today. Thanks to all of you for your help and suggestions.
Here’s what I ended up with....
115 Grn. FMJ Berrys
4.8 gr V-n340
OAL 1.146
I used my Lee crimp dye to finish off and everything seems good to go.
Tomorrow or Thursday I will get to the range and test these before continuing..
I followed many of your suggestions and am not sure what was causing my original problems, but I’m good now. Thanks again.

[Mayor McRifle]

Load a few rounds at 1.120” and then do the plunk test and the spin test with them. If they plunk and turn back and forth freely, you’re set. I load everything at 1.120” for my 6 CZs, and that OAL works well in all of them.

[TomReloaded]

Max oal is 1.169, and it's not uncommon at all for that to be WAY too long! Especially with hp's, and basically always with fp's.

It's also uncommon that a listed length in official data doesn't fit either. Unnerving sure, but totally normal for 9mm. Be aware that going short raises pressure, but never load to max when starting and you'll be safe.

For .40sw max is 1.135, and I could load out to 1.160 without problems! 9mm doesn't do that.