Directions for use --

Insert the correct caliber bullet into the BMU's tapered hole. Adjust the depth cutting stop collar to provide the desired length of cut (normally, a cut of .007-.010 inches is adequate, although some prefer a slightly deeper cut, perhaps as much as 0.012). Make sure to tighten the collar once the correct cutting depth has been attained.

A few spins of the cutter is all that is required to obtain meplat uniformity. When cutting, allow the cutter to seek it own depth of cut into the bullet tip -- don't force it down. This keeps burrs to a minimum. If a small burr (edge) is left, it can be removed with steel wool, a Scotch Brite™ pad or a medium-coarse whetstone.

If you use the cutter under power, select a medium-range RPM setting, also occasionally lube the stop collar.

A pencil or Bic® pin body inserted into a wooden block makes an excellent ejector plug to remove a bullet from the tool (with the cutter removed) for volume usage. Additionally, a hard plastic washer somewhat smaller than the bullet caliber diameter can be used to help hold the bullet firmly in place when the washer's center fits onto the bullet's boattail and the bullet's outer diameter is held in the palm of your hand.

Use on Loaded Rounds --

If desired you can use the BMU on loaded ammunition (this depends on the bullet's seated length and ogive characteristics but most loaded "match" type ammunition can be easily uniformed).

There should be a small gap between the plastic back end of the BMU and the case neck on a loaded round. If the BMU touches the case neck, remove a small portion of the back end of the plastic plug and deburr the caliber hole to allow for clearance of the neck. The cut on the back end of the plastic plug does not need to be square in order for the BMU to work properly. A belt sander will work to perform this modification.