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Old 12-09-2020, 02:01 PM
Emmo782000

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How bad did I screw up my new rifle?



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I know this is one of the most beat to death topics on gun forums, but I need some advice from the barrel experts out there.

So, I buy my 1st CZ rimfire last week, a 457. I shoot 5 rounds through it before it gets too dark. I grab my Pro-Shot stainless ground rod and some oily .22 patches. 1st patch goes through and I note it takes some force to get it through. 2nd and 3rd patch are the same story. I notice after the patch exits the muzzle and I remove it, pulling the empty rod back out of the barrel takes a little effort, like there's absolutely no play between the rod and the rifling. I started getting concerned that I just might have screwed up the rifling. After talking to a CZ rep, he told me about the barrels being super tight, and to use a .20 Cal rod. Instead of a .22 Cal rod.

So, my question is, did sliding that stainless rod down the barrel with a fit being tight ruin my rifling?
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Old 12-09-2020, 02:07 PM
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No. This has happened many times and I don't recall ever reading of damage.
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Old 12-09-2020, 02:09 PM
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I don’t think three passes like that will do much if any damage. I wouldn’t do it any more, but I feel you are ok. Since the bore was oiled, don’t sweat it. Proceed as normal, just with a smaller dia rod .


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Old 12-09-2020, 02:11 PM
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Quote:
Originally Posted by Emmo782000 View Post
So, my question is, did sliding that stainless rod down the barrel with a fit being tight ruin my rifling?
You have not damaged your rifle.
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Old 12-09-2020, 02:13 PM
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You’d think CZ would throw a warning in the box not to use a .22 cal rod, but to use a .20 rod....... Would sure diminish a lot of stress......


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Old 12-09-2020, 02:20 PM
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I reckon if there was room for it to accept a patch, there was clearance even if it was just 0.2mm. Also as it was close tolerance, the rods contact surface area was probably distributed across most of the barrel so very little hard contact. Certainly no deformation of rifling. Just be careful of the crown as always and get yourself a carbon .20 rod.
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Old 12-09-2020, 02:20 PM
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I *always* use a coated or aluminum cleaning rod in a barrel... never steel-on-steel.
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Old 12-09-2020, 02:20 PM
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Ejector post

Quote:
Originally Posted by Emmo782000 View Post
I know this is one of the most beat to death topics on gun forums, but I need some advice from the barrel experts out there.

So, my question is, did sliding that stainless rod down the barrel with a fit being tight ruin my rifling?
I have three 455's of various barrel lengths.

I suggest that your rod is rubbing the ejector post. If you sight down your barrel from the action end, you will see the post sticking up on the left side of the bore, but still in line with it.

The advantage of a .20" rod has to do with that post, not with bore tightness.
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Old 12-09-2020, 02:30 PM
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Originally Posted by Concorde View Post
I *always* use a coated or aluminum cleaning rod in a barrel... never steel-on-steel.
Interesting to read that as someone put the fear into me that aluminum could pick up something else and scratch the bore.

Last edited by whiplash; 12-09-2020 at 04:49 PM.
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Old 12-09-2020, 02:31 PM
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Quote:
Originally Posted by Omegaspeedy View Post
I reckon if there was room for it to accept a patch, there was clearance even if it was just 0.2mm. Also as it was close tolerance, the rods contact surface area was probably distributed across most of the barrel so very little hard contact. Certainly no deformation of rifling. Just be careful of the crown as always and get yourself a carbon .20 rod.
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Originally Posted by Concorde View Post
I *always* use a coated or aluminum cleaning rod in a barrel... never steel-on-steel.
Carbon/aluminum/and coated rods all love to pick up and hold abrasive material, I and 95% of the owners of better quality rifles I know use nothing but correctly sized polished stainless steel rods and wipe them off after each pass. How you wear out your barrels is your business but I prefer to wear mine out shooting them instead of cleaning them.
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Old 12-09-2020, 02:48 PM
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Quote:
Originally Posted by Emmo782000 View Post

I grab my Pro-Shot stainless ground rod and some oily .22 patches. 1st patch goes through and I note it takes some force to get it through. 2nd and 3rd patch are the same story. I notice after the patch exits the muzzle and I remove it, pulling the empty rod back out of the barrel takes a little effort, like there's absolutely no play between the rod and the rifling. I started getting concerned that I just might have screwed up the rifling. After talking to a CZ rep, he told me about the barrels being super tight, and to use a .20 Cal rod. Instead of a .22 Cal rod.

So, my question is, did sliding that stainless rod down the barrel with a fit being tight ruin my rifling?
As noted above, you haven't damaged your bore. You risk damaging the bore or chamber if you don't use a bore guide.

The .22 cal Pro Shot stainless one-piece rod is very near .202" in diameter. It won't damage the rifling. Slimmer cleaning rods such as .20 cal. are less than .20" in diameter. When used with a bore guide, neither will damage rifling, although the .20 cal will avoid the high ejector more completely than the .22 rod. Having too tight a patch on the jag risks bending a cleaning rod, especially a slimmer one, and this can cause it to come into contact with the rifling.

Your CZ bore is made to CIP bore specifications and so is not any tighter than other bores made to CIP standards, which include almost all European-made firearms. The diameter of .22LR bores made to CIP specs measured at the lands is 5.38mm (.212") and 5.58mm (.220") at the grooves.

These specs differ from firearms made to SAAMI specs. These include many firearms made in North America. The SAAMI specs call for 5.51mm (.217") at the lands, 5.64mm (.222") at the grooves.
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Old 12-09-2020, 03:46 PM
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Quote:
Originally Posted by gmd1950 View Post
I and 95% of the owners of better quality rifles I know use nothing but correctly sized polished stainless steel rods and wipe them off after each pass.
Interesting, I and 95% of the owners of better quality rifles I know use coated rods, and those people that I know are match shooters, including F-Class national winners and USA team members. Cultural differences, I guess.

Note that VUDOO has a cleaning video on their website under MEDIA, and also at https://www.youtube.com/watch?v=lT3-EQPc9Ik
and at 8 minutes in Mike shows using a Montana X-Treme rod, which is a COATED rod, though like most top quality coated rods, they use a "non-embedding" material (https://www.montanaxtreme.com/produc...3&product=Rods).
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Old 12-09-2020, 03:48 PM
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Quote:
Originally Posted by gmd1950 View Post
Carbon/aluminum/and coated rods all love to pick up and hold abrasive material, I and 95% of the owners of better quality rifles I know use nothing but correctly sized polished stainless steel rods and wipe them off after each pass. How you wear out your barrels is your business but I prefer to wear mine out shooting them instead of cleaning them.
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Old 12-09-2020, 04:14 PM
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A tight patch means nothing. I do highly recommend you buy a bore guide that is specific to your rifle.
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  #15  
Old 12-09-2020, 04:31 PM
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Quote:
Originally Posted by Concorde View Post
Interesting, I and 95% of the owners of better quality rifles I know use coated rods, and those people that I know are match shooters, including F-Class national winners and USA team members. Cultural differences, I guess.

Note that VUDOO has a cleaning video on their website under MEDIA, and also at https://www.youtube.com/watch?v=lT3-EQPc9Ik
and at 8 minutes in Mike shows using a Montana X-Treme rod, which is a COATED rod, though like most top quality coated rods, they use a "non-embedding" material (https://www.montanaxtreme.com/produc...3&product=Rods).
Really, hmm... Mike says huh...well we'll leave it at that.

Every bench rest shooter I know uses Stainless rods as does my Gunsmith who both builds and completes in F Class and is a two time State Champion and won the warm up to Camp Perry two years ago, several of his clients compete and do well too.
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Last edited by gmd1950; 12-09-2020 at 04:35 PM.
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