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Discussion Starter · #1 ·
First off I want to let everyone know I started this as a side-by-side comparison only to realize that that would be
a disservice to both the CZ 452 American we have all enjoyed over the years and to the New CZ 455 American. I think CZ
missed the boat by calling the 455 a "replacement" to the 452 rather they should have left it as the end of one model
and the beginning of a new one. That said I'm going to try and compare them only to show, in my opinion, what I think are
improvements and differences rather then stating what I think CZ did wrong or messed up.



Nothing stellar about the stock as it is still just a plain CZ. I'm sure there will be a few that pop-up with some nice figure to
them sometime in the future. One of the first things you notice when you pick up the 455 is the barrel channel looks real wide
and it is. CZ made sure the stock no longer touches the barrel anywhere on the underside or as with a lot of the 452 models,
putting pressure on the left side of the barrel.



The channel in the stock is tapered all the way to the end so it would take a little work to "drop in" a straight bull barrel.
The next thing about the barrel is the contour is tapered from the receiver all the way to the end of the barrel. The other
thing about the barrel it is no longer polished and shinny but has more of a dull satin finish that way the critters are less
likely to see something shinny when you are in the woods.

The receivers are different as pointed out in some of the threads on the forum. The receiver has some subtle but to me some
nice changes, most of the edges have a nice radius and with far less tool marks then the 452. The ejection port shape has changed
slightly as well as the receivers 3/8" dovetail.



The back of the 455 is squared off and thicker for the single lug bolt, and the non-dovetail rear action screw.



Turning the gun over CZ reshaped the tin trigger guard trying to make the rolled steel a little more palatable.



Gone is the 3 hole guard, it is replace with just 2 action screws, the wood screw was left out.



Sorry Gerald but CZ must have thought that a #30 Torx action screw would be an improvement over the old slot screws and I agree. :)

Working the bolt on the 455 was a little disappointing on the one in the photos. It was very rough feeling. A little
polishing should make a BIG difference. The trigger pull is not much different then the stock 452, long, gritty and at 3lbs 12oz
for a 10 pull average on my digital Lyman gauge right out of the box.

Removing the two Torx screws(47/57), it looks like CZ purchased them off the shelf rather then make them in house(just guessing).



The receiver(15) slides out of the stock with ease and everything stays together until you turn the receiver on its side,
the "Magazine Housing Insert Pin"(13) falls out.



With the receiver out it looks like the stock should be a lot easer to bed or install pillars if you are so inclined. Both the
action screws thread directly into the receiver making the stock fit seam a lot more solid.



The trigger is about the only thing that looks the same as the 452. Not sure if the magazine well(16) is the same as the 22MAG/17HMR
other then the hole for the "Magazine Housing Insert Pin"(13).





Wanting a little better trigger pull for the "test" target I pulled the sear out, only to find it is different then the 452 sear that
came in the 22Mag so I modified one of mine because I wanted both to have adjustable sears with about the same pull weight
for the target testing.



I do not recommend the modification(wait for the new adjustable sear) as it does not keep the bolt from sliding out of the
receiver when pulling it open every time. The adjustable sear dropped the trigger pull to 2-lbs 10oz with the stock spring
at the factory setting, backing the spring nut off I easily achieved 2-lbs and that is where I had hoped to end up so both
rifles would be about the same.

I left the barrel in the receiver because I wanted to see how it would group out of the box without changing too much. I'm
sure some will say that the threaded barrel in the 452 is FAR superior to the 455s set screws and to that I would just say
then that would make my Anschutz somewhere near the bottom quality wise because they used a pin to secure the barrel.

The bolts are noticeable different in that the 455 had to accommodate both 22lr and the 22Mag cartridge.





As pointed out the single lug of the 455 allowed CZ to thread the action screw directly into the receiver having the extra thickness
in the bottom of the receiver where the second lug used to be.



I'm not sure why yet but the magazines are slightly different in that the end has a "U" shaped notch where the cartridge exits.



I did notice when shooting the test targets that some of bullets were getting shaved slightly. That may be why the magazines
are different, as I did not notice if the old mag was the only one shaving the bullet or not.

After putting the 455 back together, installing a standard picatinny mount and tossing on the old Tasco 6-24 AO scope, I grabbed my portable bench and a few sand bags then headed out to punch some paper.

I got the scope close and shot about 20-30rds chasing hulls out to about 75yrds so the barrel would be fouled a little.

First group was Federal 510 and it was, well, ok for Federal.



Next I shot some CCI subs as that is what I like to use in my can, the group tightened up rather well.



After that I tried some Winchester SS ammo I picked up on a road trip through Tulsa, OK. I think the stringing might have been
from not shooting enough through the barrel before moving to the paper.



Next I shot 10-15rds of Wolf MT before moving to the paper. This is where I noticed, like most any of my other I own, CZ 455 liked Wolf MT.



All the 5 shot groups(except the Win-only 4) were done at just short of 50yrds and I think they are plenty good for minute-of-squirrel.

Overall I don't see many people being disappointed with the 455 as a first purchase. I'm sure because it is a "first model year"
there will be some small things show up but for the most part, for me anyway, it's another CZ to add to the collection.

Because of forum limits, I posted more pics below.
 

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Thanks for taking the time to put this comparison together. Very informative. I got to handle a 455 for the first time last weekend at a store I stumbled across near Jasper, GA. I did notice that the overall finish of the gun looked better to me than my 452.

Did you happen to check the torque of the barrel screws before and/or after your range trip?

Also, what torque setting did you use on the action screws, and did you experiment any with it?

Your groups look very good for a new rifle, dare I say it, as good as most new 452's out of the box....:eek:

Thanks again!
 

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Thanks for a good and fair to both guns report. I would not be afraid to buy a 455. The magazines being interchangable for the 22LR will make the 455 a better buy for people that already have a 452 and some spare mags. One thing that drew me to the 452 was the nicely contoured barrel. Something that I just like the looks of but should have no impact on the rifles performance. Great report and some good shooting!
 

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Nice even handed write up Bob, as to the cheap off the shelf Torx head action screws I bet I know two companies that will address that problem, with varying degrees of success.:D I'm thinking the PMTJ and Leo58's trigger improvement will work just as well as they do on the 452, seems there is some question with the YoDave kit as of now. I said not long ago I couldn't see any reason the 455 shouldn't shoot.
 

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Nice even handed write up Bob, as to the cheap off the shelf Torx head action screws I bet I know two companies that will address that problem, with varying degrees of success.:D I'm thinking the PMTJ and Leo58's trigger improvement will work just as well as they do on the 452, seems there is some question with the YoDave kit as of now. I said not long ago I couldn't see any reason the 455 shouldn't shoot.
Yes, very nice write up, Thanks. As to the question of the Yodave trigger kit working in the 455 I have installed the kit components in mine and they seem to work fine. Of course I put them in before I knew there was a question about them working so that may make a difference;)
 

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On mine, I also noticed the angle of the trigger rod/spring was greater on the 455. This picture shows it well. The hole in the receiver tang is further back as well. This was the only problem I had making an Mwerks 452 bore guide fit. It is an interesting difference, visually. I wonder what difference it has on the trigger pull, if any.

Also note I had no problems with the yodave (other than only the smallest shim was usable because I had very little creep to begin with). I love the trigger now.
 

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Discussion Starter · #18 ·
.......Did you happen to check the torque of the barrel screws before and/or after your range trip?....
I did not remove the set-screws but I will ask CZ USA what is the recommended torque setting.

....... Also, what torque setting did you use on the action screws, and did you experiment any with it?....
As with most CZ I started at 20in lbs and did not have time to adjust them differently. Maybe next time I get to the range....???

HotRod, does the 455 have the set trigger or is that one of the things that may be added later?
No, the trigger is basically the same as the 452

...... seems there is some question with the YoDave kit as of now.....
I don't see anything that would cause any problem when using the YoDave kit. I did notice a slight difference in the top half
of the sear not having the clearance that the older 452 sear has but like I said I don't think it will be an issue.

:cool:
 
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