In regards to primers and carbon prime an empty case put it the chamber point it in a safe direction and pop it in a clean barrel and then clean the barrel and I think you will be quite surprised on how much fouling comes out!

JLouis

I'm going to side with Jan on this one over cleaning your barrel is just as bad as leaving the powder fouling. I have always treated my lead bullet barrels like .22 rimfire barrels. For the most part I clean once a day. I clean until the fouling is out and all I have on the patch is some cooked lube. 
Some powders give more fouling than others 4759 is notorious for shooting dirty. With powders like that I will run a wet patch down through bore and then a dry patch every 20 to 30 shots depending on weather. Then I shoot two foulers and go back to work.
I have used Ed’s red for years now and have found it to be as good or better than most commercial solvents and a lot cheaper.

40 Rod

Chris weather conditions and location seem to dictate the amount of carbon fouling. Some days it gets real bad out my way and other days not as bad. One just needs to keep an eye on it and clean accordingly and your approach would be a good one. 

JLouis

nuclearcricket wrote on Apr 9^th, 2015 at 12:55pm:


The 'Monkeytail' (capping breechloader) system had a fairly good way of dealing with fouling: the first shot was from a clean barrel. The second (and subsequent) shot(s) cleared the fouling with the wad which sealed the breech.

Method: insert round (bullet attached to nitrated paper case, which held the powder.
Follow  round with wad.
Close breech, place cap on nipple.
Fire!

The second round is put in, pushing the in-situ wad in front of the bullet. This scrapes clean the bore (theoretically) for the next shot.

I believe that the 1,000 yards Open at Bisley was won by a Westley Richards monkeytail one year, though IIRC the bore was wiped through after each shot.

(I really want a Monkeytail!)

--
Aonghas

Chris
When I get an older gun in here that is so packed full of fouling that it looks shot out I cork the muzzle and fill the barrel with the same carbon remover we use on the ships to clean carbon deposits off the injector nozzles. It works amazingly well at completely liquifying the deposit and it has to be absolutely non etching as even the slightest corrosiveness would destroy the injector. But sadly it is a commercial product so there is no chance you can just run out and buy it in a retail setting. But it might be food for thought if there are similar retail products.

I agree with Mr Louis
JB bore will not harm your barrel. In fact diligent use can greatly improve a barrel. I use lots of it on the barrels I send out of here. Both JB Bore and JB Bright. After lapping every barrel gets a thorough polishing with JB products and I send a sample out with every barrel for the user to condition the bore during break in.

Two of my barrels won the USFT and the Extreme Benchrest Open last year. Your more than welcome to verify these claims for yourself.

My n.o.s. 1919 5 groove military match barrel gets a couple of dry patches after each match where I fire 60 or more 200 gr cast and checked bullets lubed with 50/50 alox/beeswax.   Powder is 16.5 2400.  Cleaning to metal requires 30 rounds or so to get shooting again.
  HBO and 4227 burn well for me and a couple of dry patches leave my bore sweet and clean in the 32-20.   Of course my 32-20  experience is scant; chamber residue bothers me but I'm still fire forming and working up to full obturation.  Lube may contribute to fouling get issues more than powder.

A couple of years ago I had a terrible problem with carbon fouling with Accurate #9 in a 32-40 I didn't realize what it was at first but knew that something was really wrong. About the time I was reading on a bench rest forum and the subject came up and one of the people there suggested running a tight nylon brush down the bore all the way out and then come back when you hit carbon the brush stops!!! And it does stop it's just about impossible to pull it on through the carbon and that is usually located in  the bottom third of the barrel depending on how much carbon fouling that you have. Since then I do run a nylon brush down the bore and back just to check and it will quickly tell you if you have carbon build up or not.

RB