I am a beginner reloader. I have a Rock Chucker Supreme and I ordered a 3 die set of RCBS 9mm Luger dies, PN 20515 Group B. I am using polymer coated lead bullets that measure .356 at the base. I worked up some dummy rounds and they get stuck in the barrel of my CZ 75B. Factory loads can move in and out of the barrel with ease but the reloads won't seat all the way into the barrel and when they are seated all the way in I need pliers to pull them out. I tried seating the bullet further in on the dummy loads but it doesn't make a difference. I also tried moving the crimp die further down but that didn't seem to help either. Empty cases that have been resized and the mouth expanded move in and out of the barrel with ease. What am I doing wrong? Any help is appreciated.
Beginner-9mm cartridges sticking in the barrel
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CKweigand
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What’s your Cartridges OAL with the poly coated bullets? I’m assuming your using RN bullets. Is the factory load a RN bullet as well? What’s the OAL of the factory round? More info please. When you say your seating them in a barrel. You mean a plunk test?
Yes it is RN 115 grain. I started with an OAL in my reload is 1.69, when the dummy load stuck in the barrel I matched it to the factory load which is an American Eagle 124 grain with an OAL of 1.147. However, when I pulled the bullet on my dummy load and tried seating it in the barreI it still would not seat all the way.
nettlle
Contributing Member
Try making them the same length as your factory loads.
My powder is Win 231 3.5 grains, bullet is polycoated RN 115 grains
CKweigand
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If what you say is true then the 1.69” OAL is about 1/2” too long for any 9mm handgun IMO. Not too mentions CZ which are notoriously famous for a short leade. Maybe you meant 1.069”?? If not maybe you should try that. In this game a decimal place could mean great results or a catastrophic event.
CZ75's have a short throat.
Coated cast RN bullets tend to be more bulbous in nose profile than FMJ or plated, so they need a shorter oal.
With some coated RN bullets I need to seat them as short as 1.080".
Increasing crimp won't help, may hurt.
You need to keep making dummy loads short enough so that you can drop them in the chamber and twist them. If they don't twist, chances are the bullets are resting on the rifling.
Coated cast RN bullets tend to be more bulbous in nose profile than FMJ or plated, so they need a shorter oal.
With some coated RN bullets I need to seat them as short as 1.080".
Increasing crimp won't help, may hurt.
You need to keep making dummy loads short enough so that you can drop them in the chamber and twist them. If they don't twist, chances are the bullets are resting on the rifling.
.308 Norma
Member
I'm not quite following. Are you saying that after you pull the bullet from your "dummy" round, not even the case will seat all the way into your gun's chamber?
Edited to say: please disregard - I see you answered my question in post #9 while I was still typing.
My bad it is 1.169 OAL. That is what the Lyman reloading says is should be the OAL. But it is good to know about the CZ needing shorter loads. Thank you very much!
nettlle
Contributing Member
I have (2) 9mm CZ's and load them at 1.090".
gifbohane
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1.169 is the max OAL.
CZ's have very tight chambers and a short leade. I get good results in my CZ 75 B with an OAL of 1.118. I use the same powder. You could not hammer that 1.169 OAL into the chamber of a CZ..
AJC1
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Where on the sami picture or the load... mine says 1.090 for 115 grain bullets
Thank you very much
fxvr5
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for reference,
the plunk test:
https://www.shootingtimes.com/editorial/reloading-tips-the-plunk-test/99389
overall length for a CZ barrel with different bullets:
the plunk test:
https://www.shootingtimes.com/editorial/reloading-tips-the-plunk-test/99389
overall length for a CZ barrel with different bullets:
fxvr5
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1.169" is the SAAMI Maximum OAL for the 9mm cartridge. Lyman gives different OALs for each bullet they load (it's right under each bullet image).
My two cz-75s have throats just like my p08s, p38s, bhps, and S&W. Never noticed any difference.
Plunk Testing:
The solution to chambering problems is to determine the cause:
Take the barrel out of the gun. Drop rounds in until you find one
that won't chamber. Take that round and "paint" the bullet and
case black with Magic Marker or other marker. Drop round in
barrel (or gage) and rotate it back-and-forth a few times.
Remove and inspect the round:
1) Scratches in the ink on bullet--COL is too long
2) Scratches in the ink on edge of the case mouth--insufficient
crimp
3) Scratches in the ink just below the case mouth--too much
crimp, you're crushing the case
4) Scratches in the ink on case at base of bullet--bullet seated
crooked due to insufficient case expansion (not case mouth flare)
or improper seating stem fit
5) Scratches in the ink on case just above extractor groove--case
Plunk Testing:
The solution to chambering problems is to determine the cause:
Take the barrel out of the gun. Drop rounds in until you find one
that won't chamber. Take that round and "paint" the bullet and
case black with Magic Marker or other marker. Drop round in
barrel (or gage) and rotate it back-and-forth a few times.
Remove and inspect the round:
1) Scratches in the ink on bullet--COL is too long
2) Scratches in the ink on edge of the case mouth--insufficient
crimp
3) Scratches in the ink just below the case mouth--too much
crimp, you're crushing the case
4) Scratches in the ink on case at base of bullet--bullet seated
crooked due to insufficient case expansion (not case mouth flare)
or improper seating stem fit
5) Scratches in the ink on case just above extractor groove--case
nettlle
Contributing Member
And if you ever try 125 gr SWC I load them at 1.085".
CKweigand
Member
Glad we got you on the right track. Keep putting in the hard work!
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