CZ 455 striker re-profile for improved performance

[@FlowerPowerNZ]

Thanks for that. As someone new to all of this I really feel like I have learned something from watching your video. My CZ455 strikes in the same spot as yours did but I took for granted this was normal.

[@CHenry1951]

I never thought of doing this, makes sense.................... thanks for sharing !!

[@ShooterB1]

I have done this to 3 of my 457's. I have noticed a reduction in flyers and ES seems to be lower. Another thing I just started messing with is bolt shims. They change headspace. Place a .002 to .007 shim behind the bolt pushes the bolt face forward. I just started messing with it. I have shot 3 - 5 shot groups and seems to shoot tighter groups. Just another way to tweak harmonics.

[@carfvallrightsreservedwith6649]

So this mod SHOULD benefit other manufacturers rimfire rifles firing pin performance.

[@kmpdesigns]

I just did this to my cz457 which had been plagued with extraction problems since i got it. Which was exacerbated by a match grade barrel. I wasn’t able to get through a 10 round mag without several cases getting stuck in the chamber after firing (which had to be pried out of the chamber with a pick). I did the extractor reprofile without any noticeable positive change in extraction reliability. This firing pin mod seems to have solved the problem. I have gone through several mags without any extraction hiccups

[@joesharman9060]

Hi, great video! I’m having light strike issues with my CZ457 MTR. I would love to see a video on doing the firing pin of the 457. You mentioned it was easier, how so? I understand the concept as you explained it, and appreciate it very much. Thanks, Joe

[@davidlewis3790]

Ever try a before and after with the same lot of ammo to see the difference over a chronograph and if so were there any difference in muzzle velocity, standard deviation or extreme spread ? What type of difference do you see in accuracy in your groups after the reprofiling ?

[@outboardfun3353]

Did you notice any improvement in group size

[@outboardfun3353]

You said you glue in your barrels. I was wondering what do you use glue them in?

[@Chuck_Carolina]

100% right!

[@johneperjesi9979]

Have you noticed any longevity issues with the firing pins, after the modification?

[@carfvallrightsreservedwith6649]

Maybe the .22 WMR could see some gains being that its rims are thicker.

[@xenomorph1317]

Funny to see how some individuals seem to get it better then the manufacturer’s itself……

[@charlesborders2893]

WHAT A BOUT GLASS IN BEDDING THE BACK RECOILPAD .

[@steelthunder76]

Lmfao