There are some very cool Electron Microscope pics of barrels at the following link: http://www.benchrest.com/wwwboard/index.cgi?read=150431

Dutch.

Dutch,

Thank you for posting this.

Great pictures.

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saeed@ emirates.net.ae

www.accuratereloading.com

Very interesting pictures. Thanks.

I thought the most interesting part was the marks from the brass brushes on the crown, whiler there are none in the barrel.

There's a LOT of "ironing" going on in there! I'm almost thinking I might have to start breaking in my barrels....... Dutch.

WOW......neet! Thanks for posting!

Dutch, I too appreciated looking at the pictures. Looks like I'll have to treat my crown a little bit better on the EA Brown.-------Chainsaw

Most interesting. Thank you. Thats a real eye opener

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NRA Life member

Just goes to show what can be learned from the benchrest crowd. These guys never rest! sure-shot

Thanks for pointing this out to us all. It is definitely worthwhile. I'm surprised a bronze brush does that!

Can you imagine a stainless brush!

Don

Don, I must admit, I have a little bit of a hard time swallowing the brush thing. Seems logical, and the only other thing that comes through would be un-burned kernels of powder. They're going about 4000 fps, but is that fast enough to do this?

Did you guys notice in the pic of the 660 shot barrel -- the tooling marks on the SIDES of the lands are ironed out! Those bullets deform EXACTLY to the bore, don't they? Dutch.

Good picts. Thanks
What are the white dots that show on the crown? Could they be the cause of the marks?

Whales, I think they are just lint from the cleaning patch? Dutch.