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CZ 457
- Thread starter A-Rob
- Start date
I had a CZ 455 Varmint Precision Trainer for 3 years. It was an accurate rifle and functioned well. A forum member bought it from me in December after I bought a CZ 457 Precision Trainer with 24" barrel.
The trigger pull is a little better on the 457, and the bolt operation is much smoother. My 457 is slightly more accurate than my 455 was, but not by much.
In these pictures I had installed a different scope on the rifle. My first shot was about 3 mil high. I adjusted elevation down 2 mils and took 3 more shots, then dropped elevation another mil for 3 more. Those shots are all marked with a black marker. Next I shot the top left group at 50 yards, it measured .247". Then I dropped the elevation .2 and shot the middle 50 yard group (.40") and set zero. After that I shot the 75 yard group and two 100 yard groups. I scattered the first 100 yard group a bit but the second group was .61". This rifle shoots pretty well.
The trigger pull is a little better on the 457, and the bolt operation is much smoother. My 457 is slightly more accurate than my 455 was, but not by much.
In these pictures I had installed a different scope on the rifle. My first shot was about 3 mil high. I adjusted elevation down 2 mils and took 3 more shots, then dropped elevation another mil for 3 more. Those shots are all marked with a black marker. Next I shot the top left group at 50 yards, it measured .247". Then I dropped the elevation .2 and shot the middle 50 yard group (.40") and set zero. After that I shot the 75 yard group and two 100 yard groups. I scattered the first 100 yard group a bit but the second group was .61". This rifle shoots pretty well.
Two CZ457s.
CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho
CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel
Sucks that I had a proof carbon barrel for the MPA build but the Ticho was approved before I got to put a round through it....
CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho
CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel
Sucks that I had a proof carbon barrel for the MPA build but the Ticho was approved before I got to put a round through it....
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What chamber does the "regular" 457 have.....? Or should I ask for the closest approximation to a know chamber design.
Two CZ457s.
CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho
CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel
Am I the only one not seeing the pics?
So, have you shot them? Just curious, do you have a preference for the chassis or stock when shooting prone or off the bench?
What kind of ammo are you shooting? My factory barrel would only seem to shoot SK/ Lapua.
Start at 15 in/lb going up 5 in/lb up to 25 or 30. Shoot a bunch of groups at each 5 in/lb interval and let the rifle tell you what it likes best. I've read that 20 in/lb is what a lot of these rifles like
I shot my MTR yesterday with Center X, 7-5 shot groups that averaged .420" @ 50 yds. The rifle has about 400 rounds thru it so far, I was hoping for a little better, I do need to make adjustments to my rest and rear bag to fit the stock better. Hopefully with a few hundred more rounds it will improve some. Trigger is 10oz. used a 24X scope. Head space at .044" Thoughts ?
Don't know how much difference it'd make, but I like headspace of .043" for SK/Lapua ammo. Have you shot any Eley through it to compare groups to what you normally get with SK/Lapua?
Yes id rather have.042 for Eley, the rifle shows signs of wanting to shoot well, sometimes get 3 or 4 nearly thru same hole with 1 or 2 fliers.....hopefully more shooting will improve things a bit...thanks
Go to Lilja Barrel website they have a good video how its measured. I believe its found as a link on the CZ455 and CZ457 page.
Here the link for measuring headspace
headspace. https://www.facebook.com/580697272005364/videos/338760933509372/
97022A128 - 316 Stainless Steel Round Shim, 0.001" Thick, 3/8" ID, Packs of 5
97022A216 - 316 Stainless Steel Round Shim, 0.002" Thick, 3/8" ID, Packs of 10
97022A169 - 316 Stainless Steel Round Shim, 0.003" Thick, 3/8" ID, Packs of 10
97022A193 - 316 Stainless Steel Round Shim, 0.004" Thick, 3/8" ID, Packs of 10
Thanks, order placed, depending on how the bolt feels, the shims may not be a fix, but will temporarily allow me to test different head spaces. That's a good thang!
i was interested in a Lithgow as well until i read about all the feeding issues, i really wanted one for a minute
Yes thats correct, slows wear down, any type of grease or moly grease is what I use....just needs a little
