SHOOTERS LOADING THEIR OWN AMMUNITION SHOULD CHECK THE CARTRIDGE OVERALL LENGTH (C.O.L.), THAT IS THE OVERALL LENGTH OF ALL THE CARTRIDGES. THIS MUST BE DONE FOR “ALL” THE CARTRIDGES BECAUSE THE INCORRECT LOADING OF BULLETS MAY CAUSE ABRUPT CHANGES OF PRESSURE IN THE CARTRIDGE CHAMBER. THE C.O.L. VALUES MAY VARY FOR THE SAME CALIBRE ACCORDING TO THE SELECTED BULLET AND, THEREFORE, A CERTAIN CHARGE OF POWDER; THESE VALUES CAN BE FOUND IN THE RELEVANT RELOADING TABLES. THIS TIME CONSUMING TASK REQUIRES THAT, AFTER ASSEMBLING THE BULLETS AND RELOADING A BATCH OF AMMUNITION, THE LENGTH OF EACH INDIVIDUAL BULLET MUST BE CHECKED ONE BY ONE. THIS IS A BURDENSOME TASK BECAUSE TAKING EACH CARTRIDGE AND HANDLING IT CORRECTLY SO AS TO POSITION IT ACCURATELY BETWEEN THE “JAWS” OF STANDARD CALLIPERS IS NOT EASY, NOR DOES IT SUIT EVERYBODY (PLACING EACH CARTRIDGE BASE ON THE “NARROW” JAW OF THE CALLIPERS MAY EASILY LEAD TO ERRORS OF MEASUREMENT) OUR GO/NO GO GAUGES ALLOW THE C.O.L. OF ALL CARTRIDGES TO BE CHECKED MUCH MORE RAPIDLY AND WITH GREAT ACCURACY. ADJUST THE TWO MICROMETRE HEADS BY INDICATING A TENTH OF A MILLIMETRE MORE AND A TENTH OF A MILLIMETRE LESS THAN THE NOMINAL VALUES TAKEN FROM THE TABLE. THEN CLAMP THE CALLIPER STEMS AND SLIDE EACH CARTRIDGE ON THE HARDENED SURFACE OF THE GAUGE. THE COMPARATIVELY “WIDE” HARDENED SURFACE ALLOWS THE USER TO PLACE THE CARTRIDGE CORRECTLY ON THE SURFACE AND MAKE SURE THAT THE CARTRIDGE GOES UNDER THE FIRST AND NOT THE SECOND MICROMETRE HEAD. THIS INDUSTRIAL TESTING METHOD IS SUFFICIENTLY SAFE TO ENSURE THAT A CERTAIN MEASUREMENT FALLS WITHIN A TOLERANCE OF PLUS OR MINUS A TENTH OF A MILLIMETRE (± 0.1 mm). THE MOST SKILLED LOADERS OR THOSE WHO HAVE BETTER EQUIPMENT MAY OBTAIN ASSEMBLIES WHOSE C.O.L FALLS WITHIN A TOLERANCE OF ± 0.05 mm (FIVE HUNDREDTH OF A mm). PLEASE BEAR IN MIND THAT THE MAXIMUM ACCEPTABLE TOLERANCE WE RECOMMEND IS ± 0.1 mm, WHICH IS A VALUE EASY TO MAINTAIN BY USING ANY OF THE CHARGE ASSEMBLIES AVAILABLE ON THE MARKET AS LONG AS THEY ARE PROPERLY REGULATED.

TECHNICAL SPECIFICATIONS:

FIRST SERIES OF CALLIPERS FITTED WITH MICROMETRE HEAD RANGE BETWEEN 0 AND 25 mm (Ø STEM 6.5 mm). MEASUREMENT RANGE BETWEEN 56mm AND 81 mm SUITABLE FOR RIFLE AMMUNITION.

STEM BLOCKING CLAMP. MICROMETRE HEADS WITH 0.001 mm RESOLUTION. 7.5 mm LCD DISPLAY READING. EASY-TO-ZERO DIAL. CHANGEABLE MEASUREMENT UNIT FROM MILLIMETRE INTO INCHES AND VICE VERSA. DATA OUTPUT. SWITCHES OFF AUTOMATICALLY. CROSS-CHECK MEASUREMENT RODS FOR ADJUSTMENT OF 0 ACCORDING TO THE MODEL.

PACKAGE: WOODEN BOX.
INSTRUCTION MANUAL ATTACHED.