Bronze Brushes

BC · Post by BC » Tue Oct 15, 2013 11:53 am

I would like to say thank you to everyone for their opinion.

BC

DaveMc · Post by **DaveMc** » Tue Oct 15, 2013 1:11 pm

I think it is worth noting case size and powder choice here. There are as many cleaning ideas as people and I don't disagree with anyone here but one thing I have noticed;

Overbored cartridges running on powders such as 2213SC can have a worse throat glazing effect than rifles such as a 308 running on 2208 or 06H. Heavy build up of carbon in the throat can be hard to remove and cause accuracy issues. Not only does this get noticeably harder to clean in such calibres but I also think the bronze brush effect becomes less. It is unlikely you will destroy your barrel with a bronze brush in the 1000 odd rounds it takes to burn one of these out. I find it very effective to give it a few scrubs with the bronze brush after the final shoot of the day while barrel is still warm but I don't go overboard.

Quick · Post by **Quick** » Tue Oct 15, 2013 2:10 pm

I do about 4-5 strokes up and back with my 6x47L. I haven't done more then that. I'll have a look up with a bore scope next time I get the chance to see what it's looking like.

DenisA · Post by **DenisA** » Tue Oct 15, 2013 2:15 pm

Not being a smart arse, but who here has decided on the best course of cleaning and the pro's and con's by checking and testing different methods with a borescope?

Cheers.

Quick · Post by **Quick** » Tue Oct 15, 2013 2:26 pm

I for one haven't. But I have noticed its easier to clean my rifle since I started using a bronze brush compared to nylon brushes.

Post by **AlanF** » Tue Oct 15, 2013 3:07 pm

DenisA wrote:Not being a smart arse, but who here has decided on the best course of cleaning and the pro's and con's by checking and testing different methods with a borescope?

I think a borescope is the most thorough way of checking effectiveness of cleaning. Some solvents, in particular Sweets are a reliable indicator of whether copper is coming out. The feel and then the appearance of a dry patch is a reasonable indicator of whether all powder is out. But a borescope will give a much clearer indication of both.

On the original question, I use a bronze brush with powder solvent, followed (usually) by Sweets on a nylon brush. With the bronze brush I never reverse it in the bore, but do pull it back into the muzzle, which some advise against, but I do it slowly and carefully. I agree with occasional Iosso in the throat as James suggested - have been doing it for years. In the US F-Class Nationals I was partnered with Kenny Adams for the first day - he Iossos the throat every time he cleans. James won Bisley - Kenny won the FCWC - sounds like quite good a endorsement for Iosso

.

Alan

Triplejim · Post by **Triplejim** » Tue Oct 15, 2013 5:20 pm

DenisA wrote: the pro's and con's by checking and testing different methods with a borescope? Cheers.

Agreed, checking with a borescope is the definitive method of determining whether a cleaning technique is working particularly when running in a barrel.
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RAVEN · Post by **RAVEN** » Tue Oct 15, 2013 9:35 pm

Not being a smart arse, but who here has decided on the best course of cleaning and the pro's and con's by checking and testing different methods with a borescope?

DenisA thats why I use KG products!

BRETT B · Post by **BRETT B** » Wed Oct 16, 2013 11:22 am

Different barrel and bore sizes can require slightly different types of cleaning !!! After shooting many years of F class and some Benchrest as well i have never seen any degrade in accuracy from Bronze brushes when used correctly. I personally think Carbon is the real killer of accuracy and my recent barrell has proven that to me.. There was a slight rough patch half way down my bore and this is where carbon was building up fast!! as a result copper would start to build upon the carbon and my pressures increased very fast during 12 shots. I had decided to try only using nylon brushes on this new Kreiger to see if any difference and after 200 rounds the pressure problems had risen its ugly head!! I then re lapped the barrell to get all the flame hardened carbon out and went back to using a bronze brush and i have had no Pressure problems since!! i Now JB'S every time i clean and my barrell has probably shot the best it ever has!! I also like Iosso but for some weird reason i found after cleaning with Iosso it would take 5or6 rounds for it to settle down and group but with the JB"S its 1 shot and it groups so it s JB"S for me . Carbon build up will vary with calibre and cartridge but i believe some people may be surprised how much hard carbon they may have in their barrell if they don"t have a bore scope to check !