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Originally Posted by limabean
Sorry 500gr-fmjrn is the correct description on the box. I’m also thinking this rifle possibly was rechambered by CZ. It has a very neat stamped 458 lott with a slash / above the 458 win mag stamp on the barrel. Thanks for everyone’s help.

Yes CZ-USA were stamping like that.


Originally Posted by mauserand9mm
Originally Posted by mauserand9mm
Originally Posted by Raspy
Whatever you said...everyone knows you are a lying jerk.

That's a bold assertion. Point out where you think I lied.

Well?
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You probably have the original CIP chamber in your rifle.
I had one like that.
It has the same throat as the SAAMI/CIP .458 WinMag tacked onto the long-brass chamber.
You can load it up and beat the now-standard SAAMI .458 Lott for higher velocity at lower pressure,
just takes more powder to do it.
However, it will give about 2200 fps with ammo supposed to give 2300 fps in the SAAMI .458 Lott.


Ron aka "Rip" for Riflecrank Internationale Permanente
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However, it will give about 2200 fps with ammo supposed to give 2300 fps in the SAAMI .458 Lott."

Just barely above the .450 NE MV and certainly enough to take all known land animals.
Also barely above the 2150 fps MV of this "old" 1886 .45-90 (.458 2.4 ) which also is more than enough for any land animal.
[Linked Image from jpgbox.com]

Last edited by crshelton; 10/07/22.

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Originally Posted by GSPfan
Load it down, you will be the only one in deer camp with a 458.
Chit, keep it full bore. Ive hunted whitetails with a sub 7lb rifle chambered in 375 RUM. I shot full house loads with a 300 gn nosler partiton. Cant kill em too much lol

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Have a 550 in 458WM, my favorite rifle. It loves 450TSXs loaded to Lott length in WM brass but groups open up with lighter bullets or shorter OAL. Consistent moa with it's favorite loads. It kicks a bit but is kind of a zen experience off the bench.
Have considered reaming it for Lott brass but would hate to affect the good accuracy.

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Originally Posted by crshelton
However, it will give about 2200 fps with ammo supposed to give 2300 fps in the SAAMI .458 Lott."

Just barely above the .450 NE MV and certainly enough to take all known land animals.
Also barely above the 2150 fps MV of this "old" 1886 .45-90 (.458 2.4 ) which also is more than enough for any land animal.
[Linked Image from jpgbox.com]

What is your load data for the 45-90? I've two of the newer Miroku guns but the Data I have doesn't have anything in a 500 gr slug going that fast. I've some 300 gr data that does. Not entirely sure I'm interested in shooting a 500 gr slug running 2150 fps with a steel buttplate.


Yours in Liberty,

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I've got 3 of the 550 safari CZ's, one in .458WM, one I had rechambered from .458WM to .458 Lott and my favorite in .416 Rigby. All three feed great and shoot extremely good. They all wear the brown Laminate wood American style stocks. One of these for $700 is a screaming deal and as you can see, I wouldn't hesitate to jump on it.

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