Strange cleaning phenomenon CZ550

S

stubbicatt

New member
So I usually clean "just enough" to feel comfortable putting the rifle in the safe.

Yesterday I decided to see how clean I can get things.

I started with Hoppe's #9 and a bronze Tipton brush, let it set for awhile, and dry patched. Then some Sweets. Oddly enough, no copper came out. Dry patch. Then Montana solvent of some sort, which smells of ammonia, so applied with nylon brush. Dry patch. Back to Hoppes #9, and dry patch.

During the dry patching after the second application of Hoppes #9, at 2 points about midway down the barrel I felt the resistance to the patch become noticeably easier, then harder, then easier, ending up harder to push out the muzzle.

At that point I was getting tired, so I put it away in the safe and began to wonder what that experience was?

So I thought I would ask, do you suppose that is the feeling of a clean bore, and the remainder of my bore remains less clean than those two spots? If so, I may have to go out again this evening and repeat the task to see whether I can get the entire bore to resist the patch so little.

If not the sensation of a clean bore, what do you suppose it was?
 
So I thought I would ask, do you suppose that is the feeling of a clean bore, and the remainder of my bore remains less clean than those two spots?
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It could be that there are tight areas in the barrel. If it were copper fouling, Sweet's should have taken it out. I would not waste my time with Hoppe's though.
Shooter's Choice is another bore cleaner that is a better choice than Hoppe's. Many Hoppe's users like it because of the smell...while the rest of us would rather use something that actually works regardless of how it smells.
Nevertheless, if it were fouling you should be able to see the dull streaks when using a bore light. If it is (heaven forbid), corrosion, there will also be dark areas.
 
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Conversely, your 550's bore might have two wide spots, as indicated by the tighter patch fit before, ahead & in-between the loose-fitting spots.





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PetahW, You may be right, but I would tend to think this unlikely since it is cold hammer forged, AND this hasn't presented itself before.

I'm going to hit it again with solvent and brushes and see what sort of changes it goes through.

Times like these I wish I had a borescope!
 
Borescope

If the good scopes only cost a bit less than a darn nice rifle---!! I agree, a bore scope would be a big help for those of us that shoot quit a bit and have various rifles. Wouldn't have to be top quality to work for most. Maybe something that a smart person could design and produce for $50?
 
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