Corbin Core Bond, 4 oz.
Quantity in Basket:
Catalog No.: CCB-4
Shipping Weight: 0.50 pounds
CCB-4 Core Bond is used to form bonded core bullets.
The advantage of bonded cores is nearly 100% weight
retention after radical expansion. Bonding has been the
basis of hundreds of successful commercial ventures in
bullet making, and provides the best possible performance
by combining high density, soft expanding lead cores with
tough copper jackets in an inseparable unit.
To bond a core to a jacket, the core and jacket are first
cleaned well to remove any lube film. A core of lead, which
fits loosely in the jacket (important) is dropped into the
vertically supported jacket. A drop of flux is put into
the jacket, and the jacket is heated until the lead melts.
After cooling in air, the bonded core and jacket are cleaned
again in boiling water with a small amount of baking soda.
Core Bond is not a glue or a solder. It lowers the surface
tension of molten lead so that the molecules can penetrate
into the copper matrix, and it removes surface oxides and
carbonates so pure lead and copper surfaces are in close
contact at elevated temperature to allow this infiltration.
The result is a virtually unbreakable bond that peels the
lead core back with the expanding bullet jacket and keeps
the core from separating.