Monday, 29th October, 2018


My preferred method of Barrel run-in is to fire a sequence of shots 1,1,2,4,11 = 19 rounds with non coated bullets.

1) Patch the barrel clean and fire your first shot.

2) Remove the residue with first patch and solvent (currently use Boretech Eliminator) pushing out the barrel.
Repeat 2 - 3 times until black on patch is clearing.
Then anoint a stiff nylon brush with solvent, scrub and leave soak overnight to remove all fouling

3) For heavy fouling barrels, on the first single shots, apply a small amount of paste (currently using Iosso bore cleaner)
on a patch over a worn stiff nylon brush and scrub the leade working to end of barrel.
Remove remaining residue with a stiff nylon brush and solvent and patch out. Repeat twice until clean.

4) We recommend using a starting oil (currently using ProShot CLP) applied as last step after cleaning.
Soak one patch and wipe clean with several patches.

There are many ways to run-in a barrel but a borescope shows me the above method is very effective.


Be wary of:
1) extended use of ammonia solvents as they etch stainless causing the barrel to copper up in later barrel life.

2) overuse of fine polishes such as JB Borebright and Autosol causing the barrel to become glazed.

3) overuse of coarse polishes such as RemClean causing premature wear in the leade.

4) failure to clean at the end of a days shooting, the fouling will harden overnight and be very difficult to remove next day.


My current preferred method of barrel cleaning is to:

1) Remove the residue with first patch and solvent (currently use Boretech Eliminator) pushing out the barrel.
Then anoint a stiff copper brush with solvent, scrub 6-8 strokes and patch clean.
Repeat 1 - 2 times as determined by the amount of black streaks on the patch.

2) For heavy carbon, anoint a stiff nylon brush with solvent, scrub and leave soak overnight to remove all fouling

3) Every 120 rounds or more, apply a small amount of paste (currently using Iosso bore cleaner)
on a patch over a worn stiff nylon brush and scrub the leade working to end of barrel.
Remove remaining residue with a stiff nylon brush and solvent and patch out. Repeat twice until clean.

4)We recommend using a starting oil (currently using ProShot CLP) applied as last step after cleaning.
Soak one patch and wipe clean with several patches.

5) Prior to shooting, patch out barrel to ensure no obstructions.

We are recommend Boretech proof jags, Iosso Nyflex brushes and Hart copper brushes

James Corbett