The Unofficial CZ 452/455/457 Thread

[BLJ]

Your crowns always turn out better than mine.

 

[Steve300xcw]

Your crowns always turn out better than mine.

Belt sander to square it up and the lil chainsaw sharpening bits for a dremel were perfect for gunsmithing duties Those tapered stone dremel bits are hard to find around here these days.

Cutting this one down was dangerous. Was the first one I ever cut...and it shot fine..Therefore I'm now an expert LOL

 

[BLJ]

I used the tapered stones on my 308.
Shoots great but doesn’t look like much.
I’m not worried enough about tit to fix it, but I’d like to do better next time.

 

[Steve300xcw]

I've started to believe that the crown isnt as important as I used to think it was..

 

[Nine Banger]

Belt sander to square it up and the lil chainsaw sharpening bits for a dremel were perfect for gunsmithing duties Those tapered stone dremel bits are hard to find around here these days.

Cutting this one down was dangerous. Was the first one I ever cut...and it shot fine..Therefore I'm now an expert LOL

I've started to believe that the crown isnt as important as I used to think it was..

That's awesome.

I love how we just go for it on Rokslide and often find out the persnickety stuff from our traditions often doesn't matter.

 

[BLJ]

I've started to believe that the crown isnt as important as I used to think it was..

I agree.
I think if it’s close, it’s fine.

 

[Antares]

Cut the American.

The scout barreled action has iron sight stuff attached to it front and rear. You can see with a scope with the front and rear removed but I think you're moving money around on the other scenario and it won't be as good as it can be.

Yeah, this is the right answer. Thanks.

 

[Q_Sertorius]

You can just take the sights off the Scout.

 

[Antares]

Anyone here put headspacing shims in their 457 bolt? Worth it?

 

[sportsmans challenge]

Anyone here put headspacing shims in their 457 bolt? Worth it?

Hever heard of that

 

[minas stiris]

 

[Antares]

Well, my plan for a new 457 American is coming together. The idea for this rifle is to be a fairly sleek hunting rifle for snowshoe hare and ptarmigan.

Parts list:
CZ 457 American (24" bbl)
Trijicon Huron 3-9x40 (duplex)
CZ 11mm dovetail rings
Timney trigger
DIP bolt knob
AB Little Bird

I'm going to have the barrel cut to 16.5" and threaded, but before I do I wanted to see how it shoots in it's factory form. I shot 150 rounds of CCI SV to break in the barrel and get some baseline 10-round groups (below; black dots are 1/4", target was shot at 50 yards). Spoiler alert: The groups were terrible. I tried to stay upbeat as I drove home telling myself "Oh well, it needs some work. You'll get it figured out." I begin inspecting/disassembling the rifle when I get home and immediately notice the rear ring has completely crack through. A little frustrating but also nice to have a "smoking gun" to explain the terrible groups. These were brand new CZ rings that I am pretty sure I installed to 35 in/lbs (CZ says 40 in/lbs). Anyway, the CZ rings seem like junk so I ordered a set of steel Warne rings. When those arrive, I'll start over and see if I can get some baseline groups before cutting the barrel.

Side note: This scope is not a great choice for a .22 given that it has a 100 yard fixed parallax, but I had it on hand so I'm going to try and run it and see how annoying it gets. I'm sure it'll be fine for shooting ptarmigan in the alpine, but shooting rabbits at sub-10 yards in the bushes is probably going to be pretty fuzzy/unfocused looking.

More updates to come.

 

[Te Hopo]

For the trigger, I'd check out the Yodave trigger shims/spring kit first unless you already have the Timney.
Its completely transformed the trigger in my 455 American, and it saves money for more ammo or other bits

I have a Timney on my Howa Mini and certainly rate them as a great option.

 

[BLJ]

I’ll say that the trigger in factory form is pretty good after adjustment.

Sportsmatch makes rings if the warnes don’t work out.

I’d also recommend getting multiple brands of ammo to try.
And depending on location, the weather may be a factor this time of year as well.