9mm Loading problem between CZ & Jericho

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Ontariooutdoorsman

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So I loaded my first pistol rounds on a progressive (Hornady).
functioned fine in my CZ. Accurate and cycled great with 3.8 gr Tightgroup and a Campo 124 gr HP.
I then tried in my Jericho and not one would fire. Very small mark on primer. Put back in CZ and fired fine. Seemed hard to eject unfired round from Jericho even though specs more were very close to my factory rounds that have been working fine. Over all COL of 1.150 to 1.155....Perplexed???????
 
The Jericho may have a tighter chamber than the CZ (although CZs are known to have tighter chambers than a lot of 9mms). At 1.155" you're getting close to max length (I think 1.169" is max) so depending on the shape of the bullet it may be jamming into the barrel end of the chamber. Some bullets are 'fatter' at the ogive and will require shorter overall loading length than others with a more tapered ogive. The fact that ejecting a loaded round is difficult leads me to believe that may be the case.

Try the 'plunk' test with the Jericho barrel and see if the round drops fully into it. If it doesn't try seating the bullet deeper (maybe 1.12"-1.13") and see if that makes the rounds easier to chamber. Also mike the bullets to see if they are .355" to .356". Some plated bullets, especially ones that are not 'doubled struck' to standardized the diameter may be oversize and will stick in the barrel end of the chamber. I assume you're putting a taper crimp on the cases to remove the flare from the expander die.

While nothing is 100% guaranteed I'm guessing the loaded length of the rounds is the main culprit.
 
ted_dent said:
The Jericho may have a tighter chamber than the CZ (although CZs are known to have tighter chambers than a lot of 9mms). At 1.155" you're getting close to max length (I think 1.169" is max) so depending on the shape of the bullet it may be jamming into the barrel end of the chamber. Some bullets are 'fatter' at the ogive and will require shorter overall loading length than others with a more tapered ogive. The fact that ejecting a loaded round is difficult leads me to believe that may be the case.

Try the 'plunk' test with the Jericho barrel and see if the round drops fully into it. If it doesn't try seating the bullet deeper (maybe 1.12"-1.13") and see if that makes the rounds easier to chamber. Also mike the bullets to see if they are .355" to .356". Some plated bullets, especially ones that are not 'doubled struck' to standardized the diameter may be oversize and will stick in the barrel end of the chamber. I assume you're putting a taper crimp on the cases to remove the flare from the expander die.

While nothing is 100% guaranteed I'm guessing the loaded length of the rounds is the main culprit.
Click to expand...

You are correct I believe. Dumb rookie mistake....just did plunk test and although was fine in CZ it failed the plunk test on Jericho....Actually likely near max on CZ....
LESSON LEARNED!!!!!!!
 
Ontariooutdoorsman said:
You are correct I believe. Dumb rookie mistake....just did plunk test and although was fine in CZ it failed the plunk test on Jericho....Actually likely near max on CZ....
LESSON LEARNED!!!!!!!
Click to expand...
I just checked the Hodgdon site & the max length for a 124 gr. bullet is 1.15" so a 1.155" is definitely long. The Campro 124 gr. HP also seems to have a slightly more blunt ogive than the 124 gr. FMJ which could contribute to you problem. FYI you may be able to drop your powder charge down a bit as well as deeper seating will increase your pressure somewhat. I'm guessing 3.5-3.6 gr. of Titegroup will work well.
 
Ontariooutdoorsman said:
You are correct I believe. Dumb rookie mistake....just did plunk test and although was fine in CZ it failed the plunk test on Jericho....Actually likely near max on CZ....
LESSON LEARNED!!!!!!!
Click to expand...

I'm not trying to beat a dead horse but that's a pretty big mistake. I keep telling everyone to ignore all OAL measurements listed in manuals/data. Check every barrel with the bullet you want to load and choose a length that works in all of them (e.g. I can load a CamPro 147gr bullet at 1.16 for my Glock 17 Gen 4 but I load to 1.09 because that's what my CZ Shadow requires). Every time you use a new bullet you'll have to check the OAL as the bullets profile might change that measurement.

Here's how: https://www.canadiangunnutz.com/for...g-question?p=14394562&viewfull=1#post14394562

P.S. Stop measuring factory rounds, it doesn't mean $hit unless you're using the exact same bullet.
 
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ted_dent said:
I just checked the Hodgdon site & the max length for a 124 gr. bullet is 1.15" so a 1.155" is definitely long.
Click to expand...

The max length for 9mm is 1.169 according to SAAMI specs. Whatever is on Hodgdon site is what 'they' used as OAL to achieve whatever load they published for that projectile.
 
4n2t0 said:
I'm not trying to beat a dead horse but that's a pretty big mistake. I keep telling everyone to ignore all OAL measurements listed in manuals/data. Check every barrel with the bullet you want to load and choose a length that works in all of them (e.g. I can load a CamPro 147gr bullet at 1.16 for my Glock 17 Gen 4 but I load to 1.09 because that's what my CZ Shadow requires). Every time you use a new bullet you'll have to check the OAL as the bullets profile might change that measurement.

Here's how: https://www.canadiangunnutz.com/for...g-question?p=14394562&viewfull=1#post14394562
Click to expand...

You are correct. What I did a major mistake and LESSON LEARNED....I will do plunk test every time trying different bullets from now on!!!!!!!
 
4n2t0 said:
Bingo!
Click to expand...

I just learned that the Max COL listed in all books as 1.169 is useless information as plunk test must be done. I was very lucky as chamber of Jericho likely was not fully closed even though it appeared to be and the primer didn't get struck properly......I'm sitting here shaking my head of how foolish and dangerous the situation was. I assumed that I was loading to the length of my factory 124gr RN that was under the max COL that I was fine however I was loading 124gr HP and there is a definite difference.

Dumb mistake.....cleaning my guns and going to load a few dummy rounds to do proper plunk test on both pistols.
 
Ontariooutdoorsman said:
I just learned that the Max COL listed in all books as 1.169 is useless information as plunk test must be done. I was very lucky as chamber of Jericho likely was not fully closed even though it appeared to be and the primer didn't get struck properly......I'm sitting here shaking my head of how foolish and dangerous the situation was. I assumed that I was loading to the length of my factory 124gr RN that was under the max COL that I was fine however I was loading 124gr HP and there is a definite difference.

Dumb mistake.....cleaning my guns and going to load a few dummy rounds to do proper plunk test on both pistols.
Click to expand...

No one got hurt and you learned something new, I'd say you made out all right.

Cheers!
 
Ontariooutdoorsman said:
....cleaning my guns and going to load a few dummy rounds to do proper plunk test on both pistols.
Click to expand...


FWIW I have 2 x 9mm and I load for the shortest OAL.

My CZ 75 SP01 Shadow is 1.150 -0.015 = 1.135
My S&W Pro 1911 is 1.172 - 0.015 = 1.157
I can't be bothered loading longer for the S&W so everything is set to 1.135
 
DAgunlvr said:
I know charts mean nothing, but according to campro’s, the col for. 124 hp is 1.110.
Click to expand...

Where do you find Campro's information? I went to their website and seen nothing of loading information.

It was a silly dangerous rookie mistake loading Pistol. Oddly enough of the three manuals I own I just discovered only Hornady displays the different Max COL between different bullet weights and designs. The rest just list the Max COL at 1.169
 
Ontariooutdoorsman said:
Where do you find Campro's information? I went to their website and seen nothing of loading information.

It was a silly dangerous rookie mistake loading Pistol. Oddly enough of the three manuals I own I just discovered only Hornady displays the different Max COL between different bullet weights and designs. The rest just list the Max COL at 1.169
Click to expand...

1.090 is the COL for Campro 124grn HP, Just finished 1000 of them. Some measured anywheres from 1.073 to 1.094 and ran fine in my 1911, K100, Alfa Project. I know the guys in the club are running any wheres from 1.061, 1.065 in their CZ's From 110 grn Cast to 124grn Xmetal.

1.150 is what people tell me they run campro FN's or my father loads his frontiers.

http://campro.ca/images/9MM124HP.pdf
 
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