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Product Information

Hand Loader! Are you looking for improved accuracy? Accuracy demands consistency and precision in every operation and component used in hand loading. The brass case is very important and sometimes important details are overlooked--such as the Primer Pocket and Flash Hole inside of the case.

In cartridge manufacturing, the flash hole is "punched" into the brass. While this is the least expensive method, it has many shortcomings and inconsistencies. The flash holes, therefore, are of different sizes and shapes. The most detrimental to accuracy are the irregular "breakouts" and "burrs" on the inside. This will cause "shot-to-shot" differences in Primer "Flame Fronts," causing inconsistent pressure/velocity and, thereby, loss of accuracy. Bench Rest Shooters have been uniforming flash holes since 1969.

With the Precision K & M UNIFORMER tools, you can realize the potential accuracy by simultaneously reaming, de-burring and chamfering the inside of the flash hole. The unique features of the K & M Tools provide uniformity with a pre-set depth stop, (Gage), surrounding the tool steel cutter, therefore, does not require the case to be trimmed to a precise or consistent length. Operation is controlled in reference to inside-bottom of case, not case mouth.

Patented in U.S. and Canada

  • NEVER use these tools in a case with a “LIVE Primer”.
  • The .50 BMG Cal. Premium Flash Hole tool has a carbide cutting head that allows the brass chips to free flow from the cutter head while chamfering the flash hole at the case web.
  • The tip of the tool has a gentle taper to help enter the flash hole.
  • Just as our “Professional” flash hole tool, the “Premium” tool chamfer cut depth is controlled from the case web.  So once the tool bottoms on the case web the cutting action is done regardless of overall case length variation.
  • Insert the tool through the mouth of the case into the flash hole and grip the case with your hand. The tool shaft diameter guides the tool through the case neck to maintain the centerline of the cartridge.  Rotate the tool handle with the other hand until you no longer feel the tool cutting.
  • When your tool is in storage wipe a light oil on the tool steel shaft.

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