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Case Prep by the Guru

By the Guru

WHEN RELOADING CENTER-FIRE METALLIC RIFLE CARTRIDGES, YOU MOST LIKELY ARE AWARE, THAT MINIMIZING CASE-TO-CASE “DIMENSIONAL INCONSISTENCIES”, IS A GIGANTIC CONTRIBUTOR TO CREATING THE MOST ACCURATE AMMO POSSIBLE. THAT CARTRIDGE CASE (EITHER NEW OR PREVIOUSLY LOADED) MUST BE MENTALLY THOUGHT OF, AS THE “FOUNDATION” OF THE CARTRIDGE. FOR WITHOUT A STRONG FOUNDATION, THE TALLEST OF BUILDINGS WILL EVENTUALLY COLLAPSE—DUH !!!!!!

TWO OF THESE FREQUENT DIMENSIONAL INCONSISTENCIES ARE THE PRIMER POCKET & FLASH-HOLE. THE PRIMARY SUBJECT MATTER FOR TRAINING PURPOSES TODAY, WILL BE THE “FLASH-HOLE” AND HOW TO ELIMINATE THOSE INCONSISTENCIES. I WILL NOW DIRECT YOUR ATTENTION TO THE ATTACHED PICTURES BELOW………………..

THE FLASH-HOLE IS LOCATED AT THE BOTTOM OF THE CASE & IS THE HOLE THROUGH WHICH PASSES THE “FLAME” GENERATED, WHEN THE CARTRIDGE PRIMER IGNITES, AFTER BEING STRUCK BY THE TIP OF THE FIRING PIN. THIS FLAME THEN IGNITES THE POWDER CHARGE INSIDE THE CASE. FLASH-HOLES ARE GENERALLY PUNCHED INTO THE CASE, FROM THE OUTSIDE OF THE CASE USING A SHARP POINTED TOOL. THE TOOL MAYBE VERY SHARP AND THE HOLES WILL BE CLEANLY PUNCHED THRU, BUT AT THE END OF A LONG WORKDAY, THAT TOOL WILL HAVE BECOME VERY DULL & THE HOLE IS VIOLENTLY TORN THRU, INSTEAD OF AN EFFORTLESS PUNCH-THRU.

THE DIAMETER OF THE FLASH-HOLE NEEDS TO BE VERY CONSISTENT, FROM CASE-TO-CASE. SO THE HOLE DIAMETER, AS WELL AS THOSE RAGGED EDGES AROUND THE HOLE, NEED TO BE ELIMINATED. THANKFULLY, THIS TASK HAS TO BE DONE ONLY ONCE, IN THE LIFETIME OF THAT PARTICULAR CASE !!!!!

SPECIAL TOOL NEEDED:  YOU WILL NEED A TOOL KNOWN AS A “FLASH-HOLE UNIFORMER” / “FLASH-HOLE DEBURRING TOOL”—EITHER NAME IS ACCEPTABLE !!!!!! THERE ARE SEVERAL BRAND WELL KNOWN NAMES AVAILABLE, BUT I WILL BE SPEAKING OF THE TOOLS I AM THE MOST FAMILIAR WITH:  “SINCLAIR INTERNATIONAL” AND “K&M PRECISION”. I BEGAN MY RELOADING CAREER USING THE SINCLAIR TOOL, BUT IT HAD A COUPLE OF FEATURES THAT COULD HAVE BEEN IMPROVED UPON & DECIDED TO TRY SOMETHING DIFFERENT. I THEN DISCOVER THE K&M PRECISION TOOL.

THE “K&M PROFESSIONAL MODEL” HAS THE FOLLOWING FEATURES & IS INTENDED FOR THE BEGINNING & ADVANCED RELOADER. IT ALSO SELLS FOR < $20.00 !!!!!!  SEE ATTACHED LEFT PIC…………

  • IT CAN BE POWERED BY HAND OR CHUCKED INTO AN ELECTRIC DRILL.
  • 100% MANUFACTURED IN THE USA—-YEE-HAW !!!!!!
  • MADE OF HIGH-GRADE & HEAT TREATED CARBON STEEL.
  • WHEN THE POINT BECOMES DULL, IT CAN EASILY & QUICKLY BE REPLACED !!!
  • POINTS COME IN 2 SIZES… .162″ / .180″. CHOOSE THE .180″ FOR THE VAST MAJORITY, OF COMMON RIFLE CARTRIDGES.
  • CASES DO NOT HAVE TO BE TRIMMED, BEFORE USING THE TOOL & A SLIDING TAPERED BRASS-BALL SLIDES UP & DOWN THE CUTTING SHAFT & KEEPS THE CUTTER CENTERED IN THE CASE MOUTH.
  • CUTTING SHAFT DIAMETER IS .185″ AND WILL EASILY ENTER .22 CALIBER CASE MOUTHS.

HOWEVER, IF YOU ARE ONE OF THOSE HI-VOLUME “CASE DEBURRING JUNKIES”, THEN THEIR NEW “PREMIUM” OFFERING,IS THE ONE FOR YOU !!!!!!  HOWEVER, IT IS CONSIDERABLY MORE EXPENSIVE ($55 & >), FOR THE FOLLOWING REASONS:

  • IT IS MACHINED FROM ONE SOLID BILLET OF AN EXOTIC, HI-TENSILE STEEL, & HEAT TREATED OUT THE “WAZOO”, FOR RUGGED DURABILITY & A SLIGHTLY BETTER CUT !!!!!
  • THE POINT IS .180″ & IS NOT REPLACEABLE, BUT IT SHOULD LAST ABOUT 10-X LONGER THAN THE PRO-MODEL.
  • IT CAN BE TURNED BY HAND OR WITH AN ELECTRIC DRILL. SHAFT DIAMETER IS .185″ & POLISHED TO A BRIGHT SHINE.
  • IT ALSO HAS THE TAPERED, SLIDING BRASS BALL, TO KEEP THE CUTTING TIP CENTERED.

BOTH K&M TOOLS HAVE INDEED EARNED THE COVETED “GURU’S STAMP OF QUALITY APPROVAL” & URGE YOU TO PURCHASE EITHER FOR YOURSELF.  GO TO KMSHOOTING.COM FOR ADDITIONAL INFO. IF YOU TELEPHONE (616-399-7894), ASK TO SPEAK TO MR. ROGER MILLER & TELL HIM THE GURU DIRECTED YOU TO PLEASE TRY HIS COMPANY’S PRODUCTS…………………………

SEMPER FIDELIS, OOORAH, & KEEP EVERY SHOT INSIDE THE 10-RING……….OOORAH !!!!!!!!  

GURU