Issues With 9MM

T

trky chsr

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First off I'm not new to reloading, not an expert but experienced. I have a CZ Shadow 1 which is very particular about reloaded ammo. Doesn't like 147gr but shoots 124gr Can-Pro's no problem. Now for my dilemma, I got 500 Hornady HAP 125gr and when loaded to O.A.L. of 1.135 they won't seat in the chamber...at all. I had access to a Glock 17 today and it would chamber and fire the first one but none after that. I measured the bullet diameter and they are pretty consistent at .353, same as the Can-Pro's. I measured several of the cases just on the edge of the brass and they are consistent at .375. My Can-Pro dummy round measures the same. I also use a Lee Factory Crimp Die. When I remove the CZ barrel and try them the Can-pro's drop right in but the Hornady's don't. It's driving me crazy (short trip) any ideas? I checked lots of different load data and the O.A.L for this weight goes anywhere from 1.090 to 1.150. TC
 
Make them shorter. There are a ton of references in this forum how you can check your own barrel for the max oal but if you want a good place to start, 124gr should be about 1.12” and 147gr can be 1.08-1.10” in the Shadow 1.

Stay away from 1.13” and longer.

Each bullet brand and weight may have a different ogive shape, so ideally you’ll check each one if you like to load them longer.
 
jimbo14 said:
Make them shorter. There are a ton of references in this forum how you can check your own barrel for the max oal but if you want a good place to start, 124gr should be about 1.12” and 147gr can be 1.08-1.10” in the Shadow 1.

Stay away from 1.13” and longer.

Each bullet brand and weight may have a different ogive shape, so ideally you’ll check each one if you like to load them longer.
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I'm just worried about pressure. I had 100 loaded (I know I should have checked before I loaded so many) and I pulled 50 of them. I went over some more references and found I can load a 125gr to 1.090 so I re-seated the rest and tried them in the barrel and it seems they will work. The H.A.P. bullet is cone shaped and even though it was the same length as the round nose it would chamber. TC
 
People get way too hung up on OAL with pistol cartridges (Or, all cartridges. CBTO is ALWAYS more relevant, as long as the round fits in a mag and feeds). There are so many different bullet profiles that it kind of makes OAL irrelevant. Much more important that it chambers properly. Do the plunk test. Establish your own max OAL. Use that. You're not going to encounter a dangerous overpressure situation by loading a bullet in such a way that it will actually chamber in a firearm, that's just not how that works. Unless there's something seriously wrong with the chamber of that firearm, or your components.
 
Pressure is not an issue because of the OAL of thr 9mm unless you are loading max loads.

For campro 146, the OAL should be 1.080 and they should feed like butter in the cz. If I recall correctly, my pet load for IPSCcminir is 3.3-3.5 of TG. N320 is a good choice too.
 
Thanks for the replies. I have an old Nosler reloading book and they are the ones that caution about pressures in the 9mm. I did do the plunk test so now I just need time to go to the range. TC
 
Hi! I have the same problem as you. I solved it by buying a special die! This die resizes the case just a bit more. I forgot the name of it. I will go check and if you pm me later today, I will give you the name.

Bye
Vlad
 
trky chsr said:
4gr of Tightgroup. The max from the data I was looking at is 4.4gr. TC
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Nice.

I use 3.9-4.0 of TG when using 124gr RN bullets, whether Berry or Campro. Oal for me has been about 1.12”. I have two Shadow 1s, and the difference in max oal between them is big. IIRC, about 0.015”. One can chamber 1.145” and the other cannot. So as Ganderite suggested elsewhere, I use a shorter oal and use that length for both. Your gun oal tolerance may vary.

My Shadow 2 is tighter than my others and I must case gauge the ammo to be sure it’ll fit, and not hang up trying to go into battery. With the S1s, a round can sit proud a few mm of the gauge and still be ok.
 
Had the same issue some years back.
My reloads wouldnt work properly, but Barnell 9mm worked fine,......so I just took all my reloads to the press & made them the same length as the barnell ammo . yup, worked just fine. Not very scientific, but had success. LOL
Had to do this for my Just Right Carbine as well.
 
Shadows are well known for having very short leades/throats. You have to seat all bullets shorter than SAAMI or whatever load you find on the internet or in a book. For instance my Shadow CamPro 147gr truncated plated bullets are seated at 1.095" COAL.

You can use the barrel, loose/disassembled from gun, to confirm your load is short enough. If it headspaces on the case mouth, it has a different sound than if it hits the bullet on the rifling. "plunk test"
 
The HAP is the same profile as the XTP correct? If so you may have to go as low as 1.07" to get away from issues. It's why I have a different JHP load for my CZs compared to pretty well all my other pistols which do fine at longer OAL. Pressure really climbs fast down at that sort of OAL so be very mindful of that. Sooner or later I am sending all my barrels to have the leade cut .004" or so deeper to be done with the silly problem.
 
B said:
The HAP is the same profile as the XTP correct? If so you may have to go as low as 1.07" to get away from issues. It's why I have a different JHP load for my CZs compared to pretty well all my other pistols which do fine at longer OAL. Pressure really climbs fast down at that sort of OAL so be very mindful of that. Sooner or later I am sending all my barrels to have the leade cut .004" or so deeper to be done with the silly problem.
Click to expand...

It's the same bullet without the striations.
 
Each pistol comes with the perfect gauge for that pistol. It is called a "barrel".

CZ and Norinco have shorter than usual throats. When changing bullet weight/shape, use the supplied gauge to do a plunk test. This is the only way to determine the OAL for that pistol/bullet combo.

Buying a separate chamber gauge will detect cases bulges, bad crimps, etc. but does not guarantee the round will chamber properly, because of throat issues.

The main thing is to ignore the published OAL. OAL is very pistol specific.

When I get a new bullet, I deliberately seat it long, do a plunk test, and then start seating deeper to find the OAL that clears the throat.
 
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