The Firearms Forum banner

I finally gave in and tweaked a CZ trigger.

3K views 7 replies 4 participants last post by  bamajoey 
#1 · (Edited)
I was going through shooting cabinet odds and ends last week and came across an old Eric Brooks CZ 452 Spring & Tube Kit. It was passed along in a rifle swap. The owner had installed the black tube and spring #2 in the CZ 452 American I received in the swap. It still had red, green, and blue sleeves along with the American's original factory spring (thoughtful of the seller, in case I ever sell it). Also, there were the #1, #3, and #4 replacement springs. It got me to thinking.

I got out the Lyman trigger pull gauge and checked the pull on my FS. It was 3 lbs 7 ozs. Since I don't pursue CMP Sporter that much anymore (3 lb minimum trigger required), I decided to install the #4 spring in the FS. I watched the YoDave YouTube video and then quickly had the replacement spring installed. There was no creep, so I did not need a sleeve. The weight of the new pull is 2 lbs 6 ozs. Repeated bump tests, action cycles, and safety engagements/releases yielded no issues.

I usually shoot this FS with the open sights, but I keep a big BSA Platinum 36X44 scope around in a set of Warne high tip-off rings. I often slap the scope on a hogsbacked stocked CZ for accuracy testing. I got the scope for like sixty bucks once from Midway. I know these can be junk, but this one holds a zero well (at least for rimfires) and even tracks decently. It is a bit dark, but it tends to work fine in the Alabama sunshine.

I thought a good test for the reduced trigger pull would be a run at the 25 yard USBR target in the RFC Online Benchrest Match. The replacement spring makes the rifle ineligible for the RFC Box Stock Factory Sporter Class. It would have been eligible for the regular Factory Sporter Class, but that class has a 24 power scope power ceiling. So, the only option was to post a score in the Unlimited Class. So, I was shooting against the big target and designated bench guns. Oh well, it won't be the first time.

This morning's conditions were nigh on perfect! Calm and 80 degrees with mixed cloud cover.





The 248-4X was my first run. One is allowed to post the best of four attempts. I never want to burn that much of my precious .22 ammo - chasing my tail. So, I will seldom fire more than one target. However, I got fired up with the 248 and its two near misses (nines) and had to give a second target a try. Oh well, it was a 246-8X. If nothing else, I was tickled that the X count doubled.

Who says a full stocked rifle won't shoot?
 
See less See more
2
#2 ·
I decided to run the rifle in the 50 yard USBR match at my shooting club this morning.

My CZ 452 FS target from the club's 50 yard USBR match this morning:



Once again, the USBR rules that we follow prohibit a spring replacement in Sporter Class. So, Unlimited Class it was. Good enough for second place.
 
#3 ·
Looks mighty good to me Danny. I went over to Rimfire Cent. and looked at the match results and the firearms being used. I am in awe of both, beautiful rifles and amazing shooting.
The targets I ordered came in and this old man screwed up yet again. Seems I didn't pay attention and got IBR targets instead of USBR targets. No big deal since they will do for our causal plinking but makes me mad that I didn't look closer.
I am a bit confused with the scoring on the IBR target as to what is the significance of the heavy green ring between 10 and 9 and how that effects scoring.
I did print off some USBR practice targets and will give them a try when we get to the range. Couldn't go this week as originally planned.
 
#4 ·
Well, that is a shame they got you the wrong ones. I am not familiar with the other disciplines and their scoring. But, I'm sure they will be fun to use. Good luck.

I used CZ Sporters from top to bottom in our local club match today. What the heck!

Sporter Class (<8.5 lb factory sporter) - Telescopically-sighted using USBR "Green Monster" Targets (Maximum possible score of 250-25X)

235-2X - Peary Willard, Kimber 82 Classic, Barska 6.5-20, Lapua Center-X
221-1X - Danny Creasy, CZ 452 American, Weaver 6-20x40, Eley Sport
214-2X - Ulus Farris, CZ 452, Weaver 6.5-20x44, SK Std+
204-0X - Reed Gamble, Savage MKII BV, Weaver T-20, SK Std.+
197-3X - Ricky King, Savage MKII, Shooters Edge 6-18x40, CCI SV
193-0X - Peter Justinius, CZ 452 American, Millett, Remington SV
192-0X - Randy King, CZ 455 American, Simmons 3-9x40, SK Std+
184-2X - Bill Parkhurst, CZ 455 American, Nikon Buckmasters 6-18x42, Wolf MT
107-0X - Brandon King, CZ 455 American, Simmons 3-9x40, SK Std.+

Custom Class (<10.5 lbs with significant modifications)

234-2X - Harry Coleman, Remington 40X, Weaver T-36, Lapua Center-X
220-2X - Mark Golson, Ruger 10/22, Mueller 8-32x44, Lapua Center-X
219-0X - Danny Creasy, CZ 452 Varmint, Weaver T-36, Eley Sport
209-0X - Ulus Farris, Savage MKII, Mueller 8-32x44, Wolf Match Extra
196-0X - Peary Willard, Savage Anshutz, Tasco 36x44, Federal 510

Unlimited Class

238-3X - Mark Golson, Winchester 52D, Weaver T-36, Center-X
221-1X - Danny Creasy, CZ 452 FS, BSA 36x44, SK Std.+
213-1X - Harry Coleman, Winchester 52D, Weaver T-36, Center-X
213-0X - Stephanie Coleman, Winchester 52D, Weaver T-36, Center-X
183-1X - David McKinley, Kimber 82G, Tasco 6-24x44, RWS Target Rifle
 
#5 ·
It is a lot of fun to modify the CZ 452 trigger. You got a better trigger pull that passed the bump test then put up some good numbers shooting. Excellent!
 
#6 ·
I have reduced one of my CZ's to 6 oz, and another one to 10 ozs. It makes a big difference in the accuracy once you get used to them. I have also reduced the pull on a Brno #4 to 4 0z. Just to add, these are all shot from a bench only, not plinking or hunting.
 
#8 ·
I have the sights from Denny but they have been replaced with a scope. Trifocals and aperture sights don't work for me.:(
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top