CZ550 MAGNUM, 458WM Situation

[Ridge Runner]

Missed the Editing time.

Regarding my reloading development;

As I was testing/ working on COAL length,
I did notice with the longer COAL a lot of the previous sloppy 458WM cartridge chambering I noticed at the range vanished allowing a bit more smoother bolt action.

 

[Triathlete3]

I had to call CZ on mine to make sure it was factory done because as you can see from the picture the 458 Lott stamp is more crude and aftermarket than the 458wm. But, they assured me it left the factory that way. Is it possible this is one that slipped by QC? Yes. I would get CZ the serial number to check.

 

[Ridge Runner]

I have several different combinations of .458WM, because I've had a Winchester M70 for a long time.

I bought a box of Hornady .458 Lott in 500g FMJ/RN to try in the CZ.

I use the Hornady 500gr DGX AND DGS for reload development. I was hoping you might have picked up something other than 500 gr bullets, and in Nosler, Norma, Swift, or Barnes.

 

[Ridge Runner]

I had to call CZ on mine to make sure it was factory done because as you can see from the picture the 458 Lott stamp is more crude and aftermarket than the 458wm. But, they assured me it left the factory that way. Is it possible this is one that slipped by QC? Yes. I would get CZ the serial number to check.

 

[BeeMaa]

I bought a CZ 550 from a guy in what was advertised as a being in .458 Lott. The rifle was in such good shape and at such a good price, that I just paid him and took the rifle home to discover it was marked .458 Winchester Magnum. (I let him know, but didn't make a big deal out of it, because I would have bought the rifle anyway)

I had read (on this forum) that some CZ 550's marked .458 Win Mag would chamber .458 Lott, so I bought a box of .458 Lott just to see if they would chamber.

They would not.


Now, I can't decide to have the rifle rechambered, or sell a box of 19 rounds of .458 Lott.
(I have to keep one as a souvenir)


The bullets for .458 Win Mag are so good now, that I really doesn't think it matters to the animal.

If it were me (and it clearly is not), I’d have it reamed to 458LOTT, have the barrel stamped appropriately and open up the magazine to accept the longer cartridge if necessary.

Having the ability to shoot either 458WM or 458LOTT is the first bonus. The second is the ability to shoot higher SD bullets. You can always load the LOTT down to WM levels, but it doesn’t work the other way around.

A saying from the hot rod car world, “there’s no replacement for displacement “. Holds true in this case as well.