The Original CZ Forum
GENERAL => Ammunition, questions, and handloading techniques => Topic started by: Smitty79 on November 09, 2014, 08:49:44 PM
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I just started loading for my new, to me, Tactical Sport in 40. I was having a hard time doing the push test described here:
http://www.czfirearms.us/index.php?topic=34225.0
Nothing that had brass loose enough to get a bullet in would fit in the barrel.
So I loaded in line with published OAL's, I've seen for Tac Sports, and did the Plunk Test to make sure I was OK. I loaded between 1.12 and 1.14 and everything was fine.
Still, I think I'd like to know what the limits of the barrel are. The 2 other CZ's and the SAR I've loaded for have very short chambers, relative to other guns of the same caliber.
I wanted to explore the limits. So I loaded a dummy round, no powder or primer, to 1.13. Then I swagged the round the using the sizing die with no primer removal assembly. This left the bullet loose enough in the case that I could push it in, but with enough resistance that it didn't just fall out.
I used this round to do the push test and got 1.18. I guess there's lots of room, though my Lyman manual says the max OAL for a 40 S&W is 1.135.
Does this all make sense? Is this a viable way to check OAL when you get get a bullet in a fired case and still get in the barrel?
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That is about what I found for our TS. I have loaded 1.160,1.150,1.140,1.135,1.130 & 1.125. I like the 1.125-1.135 oal. The mags don't like the long OALs.
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With my 40p I don't know what the max oal is, it seems to be longer than I can safely load a bullet into a case. I think its just the 9mm that has tight chambers.
Cheers,
Toby
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With my 40p I don't know what the max oal is, it seems to be longer than I can safely load a bullet into a case. I think its just the 9mm that has tight chambers.
Cheers,
Toby
Toby is correct. They don't use the 40 in Europe at all, so CZ gave it an American-sized leade. You're not going to have any issues using the reloading manual OALs with the 40 cal CZs.
;)
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Wobbly, What do you think of my push test method?
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Smitty, I have had that problem. My solution was to load a jacketed bullet after resizing only, no expander. Then I plunk test, seat a hair deeper, plunk test, seat a hair deeper, plunk test and so on and so on until it is deep enough that it spins freely.
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Wobbly, What do you think of my push test method?
That should give you the same answer. In your case, the limitation on OAL is the mag, not the chamber.
;)