Reshape Striker CZ 455 - Page 2 - RimfireCentral.com Forums

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  #16  
Old 12-27-2015, 04:34 PM
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I want to know how you obtain a spare striker to do this. I have a 453 and 455 I'd like to tinker with as long as it is reversable.
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  #17  
Old 12-27-2015, 04:35 PM
stevenc23
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You can buy strikers directly from CZ USA. I got a replacement before I started to tinker.


Lots of good info from members on this forum regarding why this might help. Here are a few threads that may help explain.

https://www.rimfirecentral.com/forums....php?p=5161400

https://www.rimfirecentral.com/forums...d.php?t=419526

https://www.rimfirecentral.com/forums...ition+accuracy

Last edited by stevenc23; 12-27-2015 at 04:41 PM.
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  #18  
Old 12-29-2015, 06:06 PM
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Originally Posted by stevenc23 View Post
You can buy strikers directly from CZ USA. I got a replacement before I started to tinker.
Did you have to call them, I've never seen strikers on their web site. What did they charge you if you don't mind me asking?

I have the Calfee book, I'd like to see what modifying the striker can do.
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  #19  
Old 12-29-2015, 06:15 PM
painterpm
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Did you have to call them, I've never seen strikers on their web site. What did they charge you if you don't mind me asking?

I have the Calfee book, I'd like to see what modifying the striker can do.
Strikers on the CZ-USA site...

http://shop.cz-usa.com/ProductDetail...01_455-Striker

http://shop.cz-usa.com/ProductDetail...riker-452-22lr

http://shop.cz-usa.com/ProductDetail...22lr-Left-Hand

http://shop.cz-usa.com/ProductDetail...riker-453-22lr

...should I continue?
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  #20  
Old 12-29-2015, 06:22 PM
TrblShtr
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455 striker sold here at the CZ Store. link

nm...painter destroyed me.

Last edited by TrblShtr; 12-29-2015 at 06:23 PM. Reason: got destroyed
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  #21  
Old 12-29-2015, 06:31 PM
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It all starts here.

http://shop.cz-usa.com/czpartslists/CZ455.pdf
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  #22  
Old 12-29-2015, 08:18 PM
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Ask and you shall receive LOL
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  #23  
Old 12-30-2015, 10:29 AM
Kestrel4k
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BTW thanks for the various close-up pics in this thread - a very good demonstration of the desired results.
I will be referencing this thread again when I start shooting my .22's again in the spring.
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  #24  
Old 12-31-2015, 04:54 PM
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Thanks for the links guys. Once I recover from holiday spending I'll get a spare for my 453 and 455 and be ready to experiment.
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  #25  
Old 01-01-2016, 08:02 AM
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I reshaped the striker on my 455 and have seen a massive reduction in fliers and group size.

Reshaped strikers result in consistent ignition which reduces harmonic variance which means better shooting. The added benefit to this is less ammo pickyness.
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  #26  
Old 01-01-2016, 11:57 AM
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Quote:
Originally Posted by IsaacCarlson View Post
I reshaped the striker on my 455 and have seen a massive reduction in fliers and group size.

Reshaped strikers result in consistent ignition which reduces harmonic variance which means better shooting. The added benefit to this is less ammo pickyness.
How did you measure the harmonic variance?
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  #27  
Old 01-01-2016, 12:50 PM
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Quote:
Originally Posted by djdilliodon View Post
When I do it, I pull bullets on live ammo and test my progress. Once you get it perfect you will actually hear the primer mixture get louder when it goes off.

I'm curious why crushing part of the rim provides better ignition?
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  #28  
Old 01-01-2016, 01:08 PM
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Originally Posted by Big-Dummy View Post
I'm curious why crushing part of the rim provides better ignition?
It doesn't. Reshaping the striker tip eliminates the lost energy used to crush the rim.
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  #29  
Old 01-01-2016, 01:47 PM
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Quote:
Originally Posted by painterpm View Post
It doesn't. Reshaping the striker tip eliminates the lost energy used to crush the rim.
Exactly. Since it's also the hardest part of the rim, if the hardness from case to case varies, the striker will not be the same and can potentially cause fliers. With a little patience it's a simple mod to do.

Edit to add: every benchrest rifle I have seen and even the Annie's from the factory hit just inside the outer rim.
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  #30  
Old 01-01-2016, 01:49 PM
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Not to hijack a thread, but I reshaped the firing pen on my Varmint not intending on ever changing the barrel. Well, I changed the .22 for a .17 and I have been very disappointed with the results, so now I am wondering if reshaping the FP has caused poor ignition on the .17. Any ideas?
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