I have a simple question and won't be able to call CZ until Monday morning.

Maybe somebody can answer this.

Are the CZ 550 and CZ 550 medium actions two different size actions?

Or is the magazine and boltface just opened in the medium?

Planning on building a 375 Ruger. I like the double square bridge design. The action will get a complete rework, including new bottom metal and three pos safety, and bolt etc.

Well I stole this from AHR
This action comes in three sizes: size 1 has a 30-06 bolt face and magazine, size 2 has a .375 Magnum bolt face and magazine and size 3 has a .416 Rigby bolt face and magazine.

If it were me I would build it on the size 1 and open the face ending with a smaller rifle. Size 2 would be longer than you need.

Ramrod,
Thanks for the head up on the AHR link. I never thought of looking there.

I already have a "standard" 550 action.

Paul,
do you have a link to that and i'll call ed and have him fix that post. they have 3 bolt faces... .473, .532, and .620, but only two action lengths

the action is the 550 magnum, which came in 300win (not anymore) 375 HH, 416 rigby, 458 win/lott (the boltface is different, and SOMETIMES a different drop in magbox)

the oinly difference is the boltface and the sheetmetal magbox MIGHT be different on the early ones, ribs or not. in fact, you can swap barreled actions to other stocks, if not bedded, as they are THAT close in expernal profile

Neal's 550 magnum (caliber) is on a 375 boltface 550 magnum cz action .. and I built mike's 470 mgobo on a 602 in 458 win...

550 Medium - just about everything else.

What I don't remember this early is if the widths are the same between the medium and the magnum... i seem to recall that they are NOT

Here is Ed's site.
http://www.hunting-rifles.com/
Jeff to be honest before my first cup of coffee I'm confused.

On the CZ site I didn't see any 300wmag length magnums listed(but I could have missed them). Only the 3.6" or longer I did think that Ed's reference to the size 2&3 was bolt face. Did or does CZ still make a magnum faced size 1 as Ed calls it? I believe that box would be 3.464" long. I still think the action with the 3.464" box would be better for the 375Ruger.

Paul,
I was enjoying my first cup at the same time.

the 550 medium is the "standard" length action, and the action is actually shorter than a 550 magnum. There's at least a .473 and .532 boltface there, but it is designed for the 3.34 max nominal round

the 550 MAGNUM is huge, and that's the 375HH, 458 win/lott, and 416 rigby (and all the 404, 450, 505, and 500jeffe) action.


there is a mag boltface in the 550 medium


the 550 magnum USED to be available in 300win...

the 550 medium is a .473 and .532 bolt face


the 550 mag is .532 and .590 (opps, retract .620 above) for the HH and rigby cases, amoung others for the 404, 505, and 500jeffe.


the medium NOW is offered in 7rem and 300 win as different stocked models.

300win http://www.cz-usa.com/product_detail.php?id=76

7rem
http://www.cz-usa.com/product_detail.php?id=22


I woul like to find a medium and do a 470 AR or 500 AR...

jeffe

Well I think after coffee we are trying to say pretty much the same thing. CZ is still making (missed it before coffee only looked in the American ) what they are calling a "medium Magnum" in 7rem mag. This would be what I would use for a 375Ruger. Without looking at them I would be willing to bet a $ that the size 1(per AHR) or 06 action only differs from the medium Magnum by bolt face. But hey I've been wrong plenty of times.

heh, it's been a longish day for me to..

30-06 and 7remmag would go in the same length action (think charles daly m98)550 medium

375/458/416 in a "magnum" action, 550 magnum, think brevix (sp) magnum mauser, as it is more or less then same length...


clear as mud?

jeffeoso,
to be clear as mud...
the 550 and the 550 medium per cz's website are the same length action, just a different boltface size. correct?

quote:

to be clear as mud...

Sorry we couldn't confuse you more.

SD,
No, the medium is either .4 or .5 shorter OUTSIDE

quote:

Originally posted by SDhunter:

the 550 and the 550 medium per cz's website are the same length action, just a different boltface size. correct?

SD Hunter, you are correct.

CZ also makes a so called Magnum Safari action, which takes the big rounds (458 Lott, 470 Capstick) with standard magnum bolt face, plus the same big action with bigger bolt face for 416 Rigby, 460 weatherby, etc.

The Safari Magnum action is much larger and not the same action as the medium magmum action.

It's my understanding that the medium magnum action is the same as used for 9.3x62, 30-06 etc, but the medium mag has a magnum bolt face.


http://www.budsgunshop.com/catalog/product_info.php/products_id/32407

Thank you,

The CZ 550 and the CZ 550 Medium are the same length action with different boltface. This is the main question I have.

The CZ 550 Magnum is the big action for the Rigby. I know this.

I have CZ 550 American that was a 270. I should be able to use this for the Ruger by just opening the boltface. Of course the follower, magazine and floor metal is getting an altered/upgraded.

If I bought a CZ 550 medium (in 7mm RM or 300WM) action I would not have to alter the boltface. But the action length is the same standard 550 action. The follower and magazine would have to be altered to handle the fat cases?

Correct?

SD, yes..

550 and 550 medium.. are the SAME action

the 550 magnum is an entire bigger one