szihn
.400 member
Reged: 24/06/07
Posts: 2121
Loc: United States
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Has anyone out there tried 147 gr cast bullets in a CZ75?
I have a CZ and I have shot 115 grain jacketed in it in the past. It's very accurate with that ammo. At 15 yards I can shoot them through one ragged hole.
I just came across some 147 grain cast bullets and with 3 out of 4 powders the bullets are hitting sideways at only 15 yards, and with 7.0 gr of AA#7 it shoots round holes, but accuracy is fair to poor.
Now the standard rifling twist for the 9mm Luger is 1 turn in 10” (or 1-9.8” to be closer) but I don’t know what the twist is in the CZ pistols. Does anyone out there know?
It is my experience that the 147 grain ammo is not the most accurate in most guns, but I was hoping for better than what I am getting.
I expect I just have to give up on the 147 grain ammo, but if anyone out there has any insights I am always willing to learn from the experience of others.
Thanks.
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StephenCoker
.300 member
Reged: 01/12/11
Posts: 140
Loc: AR, United States of America
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Not for sure of the twist rate, but my CZ75 SA, likes the Speer Gold Dot 147 grain ammo, and I run it for my personal defense ammo. After my 280 grain .44 special experimentation are over I will start experimenting more with cast bullets of 147 grains for the 9mm. I'll keep you posted what I find out.
This forum may be of interest to you in your search:
Beartooh Bullets Forum - 147 Cast 9mm
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www.stephencokerandco.com
Uniquely superlative rifles in the Scottish tradition.
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Oldbrit
.333 member
Reged: 04/04/10
Posts: 381
Loc: UK
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From the dim and distant past when the British were allowed such things I remember someone having a similar problem. Have you slugged the bore? I seem to recall that my pal slugged his and it came out at .358". Like you, he shot jacketed bullets with aplomb but lead bullets sized to .355" went all over the place. He cured it by buying a new bullet sizing die in .358".
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HistoricBore
.300 member
Reged: 28/09/11
Posts: 231
Loc: United Kingdom
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I tried all sorts of lead bullets in my Browning HP Target and none worked. Bore size was .357". Possibly these new plated lead bullets would work better.
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szihn
.400 member
Reged: 24/06/07
Posts: 2121
Loc: United States
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Hummmmmmm
An oversized bore?
Now that's one thing I didn't think to check.
I am going to the shop now to see if that's it.
Edited by szihn (01/06/13 12:56 PM)
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szihn
.400 member
Reged: 24/06/07
Posts: 2121
Loc: United States
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Well darn
The bore is .3562" and the bullets are sized .356" so that's not it.
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