The best bronze bristle brushes do their hardest work in 60 strokes, and by 100 strokes, they are used up. As the bristle pushes up against the bore, the bristle bends applying pressure to the bore. As the bristle wears to the point where the bristle just sticks straight out to touch the bore, the scrubbing power is GONE!
If you measure the new brush, then measure again every 20 strokes, you will be amazed at how they wear. Variations in new brush dia can vary greatly also.
I save worn brushes to wrap patches around, brush with JB, etc on badly fouled barrels, or wrap FINE bronze wool in the worn brush to scrub with.
I found the biggest flaw in my cleaning system was using bronze bristle brushes too long. Brushes do the work, fluids seem to be the carrier solution.
I have a 308 custom that I shoot 175g TMK in with 42g of IMR 8208, lapua brass, cci 200s that shoots 3/4" at 300 yards, BUT cleaning that powder out of the barrel would test the patience of JOB! That 8208 burns real HOT!
Tipton has a new brush with 30% more bristles, and they work very well.
If you measure the new brush, then measure again every 20 strokes, you will be amazed at how they wear. Variations in new brush dia can vary greatly also.
I save worn brushes to wrap patches around, brush with JB, etc on badly fouled barrels, or wrap FINE bronze wool in the worn brush to scrub with.
I found the biggest flaw in my cleaning system was using bronze bristle brushes too long. Brushes do the work, fluids seem to be the carrier solution.
I have a 308 custom that I shoot 175g TMK in with 42g of IMR 8208, lapua brass, cci 200s that shoots 3/4" at 300 yards, BUT cleaning that powder out of the barrel would test the patience of JOB! That 8208 burns real HOT!
Tipton has a new brush with 30% more bristles, and they work very well.