Flash rust.......have to patch dry the boreimmediately after coming out of the hot water rinse.

Then let it lay for 5 minutes for the residual heat to bone dry the bore...then plaster the borebutter to it...3-4 applications of a lube patch with BB heavily spread all over it with a putty knife or popcicle stick, etc.

is it necessary to use HOT WATER.i did not for 35 years and no problems.

After reading your posts and methods of application Roundball. I am sure the reason I failed when using bore butter is I must not have used enough bore butterwhen I coated the barrel. I used maybe two patches smeared with bore butter on them, but never took apopsicle stick or putty knife and packed that kind or amount into the barrel.

Now I agree that I also used VERY HOT to almost BOILING water to prepare the barrel for the application and to make sure it was bone dry. I think I just could not make myself put that much bore butter into the barrel.

I use hotwater with dishwashing detergent as they are the best known productsfor getting something squeaky clean...and a hot water rinse to rinse off the dirty salty solution.

The reason I choose to do this is because I use bore butter lube and want no buildup in the bore what-so-ever...and my decisionto usesteaming hot water can best be described with this analogy of bore butter on the walls of a bore, to egg residue on a breakfastplate:

If you hold a breakfast plate under a cold water faucet to rinse of the egg residue, it sits right there clingling to the plate for ever;
But if you hold it under a steaming hot water faucet, the egg residue melts and slides completely off the plate, add a drop of dishwashing detergent and the plate issqueaky clean.

If it's not 100% removed after each use...100%...there will be leftover material which is the beginning of 'buildup'...and at some point buildup willaffect accuracy and/or trap moisture or contamination in the bore which will lead to rust or corrosion...so I take my barrels back to the bare raw metal after each use, and use steaming hot soapy water to do so.....my .02 cents.

i never shot a lot in those 35 years,so maybe thats why i never had build -up. all my practice was behind shoulder of buck,ha.but, i do feel ,as you that HOT water will cause RUST.like you say, if not dried right away,oh boy.i bet many are getting rust from this and not bore butter. i know that for fact because i never got rust in 35 years until i used ,HOT WATER.

ORIGINAL by Roundball:
Hmmm - I wonder if I wasn't letting the barrel dry out enough before putting the bore butter on. I may have actually been sealing some moisture in under the BB. That's not a pleasant thought

.

I USED warm water AND BORE BUTTER FOR 35 YEARS,no rust,then this year i used REAL HOT WATER. guess what, now i have RUST.boo yah![quote]ORIGINAL: sproulman

I don't think I will use bore butter any more. If using a patched roundball the lube on the patch will prevent fowling enough.

you can use bore butter as your patch lube and it will work just fine.