Screeching noise while using cleaning rod?

[roushstage2]

Hey all. I got my new .308 today, and for the first time, used a cleaning rod and patches to clean the bore instead of a bore snake. I also have the Sinclair bore guide. I'm using a Tipton Carbon Fiber Cleaning Rod, Bore Tech Proof Positive Rifle Jag .30 cal and Gunslick patches.

The first few passes were fine, but then it started making a screeching noise while I was pushing the patch down the barrel? I noticed the jag seemed to start to unscrew from the pass down the barrel, but am also unsure why? The rod handle twists, and I don't think I'm somehow twisting/turning the rod because of it...

I guess, WTF is wrong here? I looked down the barrel of the rifle from the chamber end with a very bright LED light at the muzzle, and it looks fine? I can't see the top of the barrel though.

[Alex$]

Sounds like it is horribly rusted beyond any hope of salvage, throw it away. Better yet, send it to me and I will make sure it is useless, (in about 15,000 rounds).

Normal for a barrel to be "squeaky" clean.

[roushstage2]

This sounds like a metal to metal sound though (quite high pitched), hence the concern. My 8 y/o stepdaughter even asked me what was wrong with it.
EDIT: IDK, I guess it must just be "squeaky clean" because it only makes that noise when I'm pushing a patch through. My first time using a cleaning rod. Just wanted to make sure nothing was going wrong.
EDIT 2: Tried a dry patch with a plastic jag I have. Same noise.

Awesome; just very clean! Thanks!

[JacobCR03]

What type of cleaning solvent are you using on the patches? (I've heard that sound with a dry patch in a dry barrel.)

[Grumpyoldretiredcop]

Just be sure it's not your cleaning rod bending and touching the bore or chamber. Otherwise, the squeaky noise is no big deal.

[roushstage2]

Just be sure it's not your cleaning rod bending and touching the bore or chamber. Otherwise, the squeaky noise is no big deal.

I did check again, and it wasn't either. I found that plastic jag, ran it through and the squeak was still there. Ran a wet patch through and the noise went away. I guess the barrel is just nice and clean and ready to be shot out of!