CZ bore concern
- Thread starter 168bergersapper
- Start date
- Location
- Northeastern Ontario
This is very important. The barrel retention screws should be torqued to about 35 in lbs (CZ recommends even higher, although the guys at RFC say it's not necessary to go to 45 in lbs).
The action screws should be torqued to a maximum of 25 in lbs, but it may be a good idea to start much lower and shoot for groups to see where the best results are obtained.
And, yes, it is true that CZ's have a tighter bore; read the following http://www.rimfirecentral.com/forums/showthread.php?t=205605
Your 22 cal dewy rod is most likely catching/scraping against the bolt guide. Just take the action out of the stock, remove the 2 bolts holding the mag well and slide out the bolt guide while pressing the trigger (it is the silver component inside of the action). The little stubby on the bolt guide usually scrapes 22 cleaning rods, 20 cal rods clear fine). You should be able to clean the barrel now the way you are used to. Hopefully you have a decent bore guide.
Like others have suggested, the inaccuracies of your rifle could be related to your scope (parallax) and perhaps the thickness of the reticle. But I agree with OldSavage, it shouldn't add up to 1.5-3 in groups. You probably have a combination of smaller issues that are adding up...Until you get a rimfire/or AO scope you won't really know for sure what your rifle can do...
If you have a decent torque driver, I would start with checking the barrel grub screws and re-torque them to 30-35 in lbs. Have you ever removed the barrel before you went shooting? Checking the action screws is also important. Also evaluate how the action fits into the inletting. Is it rocking in the stock at all when you remove the action screws?
Why don't you post some pictures of the groups you shot, maybe there are some patters that could point us in the right direction.
Kody
Like others have suggested, the inaccuracies of your rifle could be related to your scope (parallax) and perhaps the thickness of the reticle. But I agree with OldSavage, it shouldn't add up to 1.5-3 in groups. You probably have a combination of smaller issues that are adding up...Until you get a rimfire/or AO scope you won't really know for sure what your rifle can do...
If you have a decent torque driver, I would start with checking the barrel grub screws and re-torque them to 30-35 in lbs. Have you ever removed the barrel before you went shooting? Checking the action screws is also important. Also evaluate how the action fits into the inletting. Is it rocking in the stock at all when you remove the action screws?
Why don't you post some pictures of the groups you shot, maybe there are some patters that could point us in the right direction.
Kody
Kody pretty much has it.
To confirm the cleaning rod problem,clean from the muzzle to the chamber and confirm no dragging on anything.
I believe also the rod is scraping on the shell extractor on the bolt guide.It won't hurt to clean this way to eliminate the dragging problem,you could also remove the barrel to confirm.I hope this helps some.
R
Did you take the time to shoot enough bullets thru the bore when changing brands before shooting groups?
If you shoot your groupings while swapping bullets brands, these large groups are normal. shoot at least 20-25 bullets of one brand to "season" the barrel with
the bullet's own lube before starting to shoot for groupings.
One good habit is to shoot a complete box of one brand before swapping brand. You open a box, you plink with the 1st half (25), then slowly shoot 5 groups of five
with the remaining 25 bullets.
If you shoot your groupings while swapping bullets brands, these large groups are normal. shoot at least 20-25 bullets of one brand to "season" the barrel with
the bullet's own lube before starting to shoot for groupings.
One good habit is to shoot a complete box of one brand before swapping brand. You open a box, you plink with the 1st half (25), then slowly shoot 5 groups of five
with the remaining 25 bullets.
- Location
- West Quebec
tagged
David Henry
CGN Regular
- Location
- West of the big road
Leading!! and without a bore scope its hard to see but it sounds like there could be a lead deposit built up in the bore. Even ELEY'S best cant compete with lead swarf. Nor will you have ease of pushing your 22 rod and brush past the deposit. Hold the barrel up against a light source and tell us what you see. D.H.
The 452 manual says nothing of their tighter bore width. I 'readed' it all. I then 'readed' the 455 manual - and low and behold, it says nothing about a .221 bore there, either. ht tp://cz-usa.com/hammer/wp-content/uploads/2014/04/Instruction-Manual-CZ-455.pdf
After I sold my Sako Finfire I bought a CZ...one of about 6 now and I keep coming bak to them too.
What I found out was that one needs to buck up and by the cleaning rod for the 17 caliber.
The chamber is much tighter than the standard .22 cleaning rod allows.
RimFireCentral is a great resource for anything CZ rimfire.
Even a bore snake will be more than sufficient for cleaning your CZ, but thats just my opinion.
I'll even share this bit of advice too, my CZ have shot CCI Stingers and American Eagle Hollow Points and killed many a gopher and shot many a penny at 25 long paces .
Try that ammo (AE Hollow Points) for shooting pennies and if you can not do it with regularity after 5 rounds Ill by you a box of Elley Brand ammo in .22 of your choice.
Tight Groups,
Rob
****Edit****
to the OP, shoot a scope that is for rimfire rifles (parallax adjusted).
All things to consider and these are not a way for me to weasel out of my offer.
use a rim fire scope.
proper set up of scope and rings.
correct or adjusted torque of action screws.
You will not be disappointed in your choice of rimfire rifle.
What I found out was that one needs to buck up and by the cleaning rod for the 17 caliber.
The chamber is much tighter than the standard .22 cleaning rod allows.
RimFireCentral is a great resource for anything CZ rimfire.
Even a bore snake will be more than sufficient for cleaning your CZ, but thats just my opinion.
I'll even share this bit of advice too, my CZ have shot CCI Stingers and American Eagle Hollow Points and killed many a gopher and shot many a penny at 25 long paces .
Try that ammo (AE Hollow Points) for shooting pennies and if you can not do it with regularity after 5 rounds Ill by you a box of Elley Brand ammo in .22 of your choice.
Tight Groups,
Rob
****Edit****
to the OP, shoot a scope that is for rimfire rifles (parallax adjusted).
All things to consider and these are not a way for me to weasel out of my offer.
use a rim fire scope.
proper set up of scope and rings.
correct or adjusted torque of action screws.
You will not be disappointed in your choice of rimfire rifle.
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Now thats real funny right there.
I went to Crappy tire in WR to get some Hornady 17HMR ammo for a tad under $20 for 50 rounds.
The off to No Sale Sports to investigate some Rings, brush and jag for said CZ.
I came home with the brush and jag...they had the Dewy.17 cleaning rod along with the adapter for the standard thread count hoppes and the likes brushes etc...
Ahh the joys of retail therapy even if I had to chase down the ammo and no rings.
Guess the Weaver Steel rings will have to do.
Tight Groups,
Rob
Zedbra there was a lil brass piece that came with your Dewey Rd when it was new.
I have not seen them separate in some time.
From Brownells web page 17A, 5-40 male/8-32 female converts .17 caliber Dewey rods to accept 8-32 rimfire accessories.
Rob
I have not seen them separate in some time.
From Brownells web page 17A, 5-40 male/8-32 female converts .17 caliber Dewey rods to accept 8-32 rimfire accessories.
Rob
