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Old 12-11-2019, 08:43 PM
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CZ 457 MTR in the house!



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I picked my MTR up today from the FFL. I adjusted the trigger, and the best I could get it down to was 2 lbs. Nice and crisp, but I'm used to a pound or less on bench guns. I can see a trigger spring change in it's future. The chamber was so tight that I just ordered a .17 CF cleaning rod. .My .20 coated rod seemed pretty tight, so I'll just wait to clean it.

Do you guys use a Bore Guide when cleaning your CZ's, and what model do you use?

The Bore Guide diameter I have is suppose to be ok for .22 but the diameter is too big to fit through the bolt hole, works fine for my .223.
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Old 12-12-2019, 10:25 AM
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Quote:
Originally Posted by 45ACP223 View Post
Do you guys use a Bore Guide when cleaning your CZ's, and what model do you use?

The Bore Guide diameter I have is suppose to be ok for .22 but the diameter is too big to fit through the bolt hole, works fine for my .223.
Terrific question. I'm greatly interested to learn what other folks are using as a bore guide for cleaning their MTR barrels as well.
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Old 12-12-2019, 03:05 PM
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I did some searching and a lot of threads talked about the ejector interfering with using a bore guide, so I'm not sure at this point if one will work or not. Hopefully, someone will chime in with some feedback on if they work with the CZ design or not.

Last edited by 45ACP223; 12-12-2019 at 09:14 PM. Reason: ejector not extractor
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Old 12-12-2019, 08:50 PM
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Check with Possom Hollow
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Old 12-13-2019, 10:32 PM
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Thanks for the tip, I ordered one from Brownells tonight along with more ammo for testing.

FYI, Buds has MTR's back in stock if anyone is looking for them. About $30 more than I paid, but not bad since they seem pretty hard to find in stock.
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Old 12-13-2019, 11:13 PM
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Originally Posted by 45ACP223 View Post
...Nice and crisp, but I'm used to a pound or less on bench guns. I can see a trigger spring change in it's future.
I read on several posts where folks are using a stock 10/22 trigger return spring in their 457's...myself, I cut two coils off my factory spring and am down now, to 10 oz. trigger pull. I might try the Ruger spring, or an aftermarket spring...I just ordered some Wolff Reduced Power 10/22 trigger return springs, 3-pack, hope they work!

Last edited by jqar45; 12-13-2019 at 11:28 PM.
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Old 12-14-2019, 08:06 AM
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Quote:
Originally Posted by jqar45 View Post
I read on several posts where folks are using a stock 10/22 trigger return spring in their 457's...myself, I cut two coils off my factory spring and am down now, to 10 oz. trigger pull. I might try the Ruger spring, or an aftermarket spring...I just ordered some Wolff Reduced Power 10/22 trigger return springs, 3-pack, hope they work!
I tried that and found that the Wolff lighter spring was too light. I have Kidd's 5-return-spring tuning pack and will try them one by one.
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Old 12-14-2019, 09:53 AM
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I've got an assortment pack from Harbor Freight. I found one size that worked perfect for my 452's and got me under 1 lb. I just need to find the time to swap them out and reset the adjustments.


https://www.harborfreight.com/200-pi...set-67562.html
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Old 12-14-2019, 07:41 PM
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I made it to the range today, brand new barrel, conditioned it with 10 shots to lube it up. Shot 4 groups of 5 shot each, changed ammo and seasoned the barrel with another 10 shots. Started out a little crappy, but ended better. Here are my results:

CCI SV, (sucked, 20 shot avg. = 0.94" C-T-C
Norma Tac22, ok, 15 shot avg. = 0.59" C-T-C excluding 1 flyer.
Norma Match, 10 shot avg. = 0.92" C-T-C including what look like 2 flyers.
SK Rifle Match, best so far, 20 shot avg.= 0.39" C-T-C best 5 shot group = 0.29"

I've got about 10 more boxes of various brands to test out (Eley, SK, Lapua, Aguiia), but the SK RM shows some promise. I definitely need to replace the trigger spring, and get the weight down under a pound this week, I don't like the 2 lb. stock trigger weight.

Attached below is the SK RM target info. (first Tac22 on the left was to re-lube the barrel initially).
Attached Images
File Type: jpg CZ457 MTR -1.jpg (485.6 KB, 4 views)

Last edited by 45ACP223; 12-14-2019 at 08:12 PM. Reason: spelling
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Old 12-14-2019, 10:51 PM
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Quote:
Originally Posted by 45ACP223 View Post
I picked my MTR up today from the FFL. I adjusted the trigger, and the best I could get it down to was 2 lbs. Nice and crisp, but I'm used to a pound or less on bench guns. I can see a trigger spring change in it's future. The chamber was so tight that I just ordered a .17 CF cleaning rod. .My .20 coated rod seemed pretty tight, so I'll just wait to clean it.

Do you guys use a Bore Guide when cleaning your CZ's, and what model do you use?

The Bore Guide diameter I have is suppose to be ok for .22 but the diameter is too big to fit through the bolt hole, works fine for my .223.
This may help.
https://www.rimfirecentral.com/forum....php?t=1161655
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Old 12-15-2019, 09:30 PM
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Thanks, as I mentioned earlier, I've got one on order. Should do the trick!
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Old 12-15-2019, 10:24 PM
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Quote:
Originally Posted by Tom_in_MO View Post
I tried that and found that the Wolff lighter spring was too light. I have Kidd's 5-return-spring tuning pack and will try them one by one.
Well shoot...well, maybe the stock 10/22 spring will work...are you talking about the Kidd 10/22 spring tuning pack?

Last edited by jqar45; 12-15-2019 at 10:28 PM.
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