6mmPPC
Page 2
The case length is now read relative to the nominal chamber length 0.000 on the dial face.
The gauge will arrive set up for a nominal PPC headspace of 0 on the indicator dial face. You may need to adjust for your particular chambering by resetting the bezel (the moveable outer ring). Your nominal head-to-shoulder length can be inferred from fire-formed cases and from bolt feel. (For aesthetics you may wish to adjust slightly the depth of the dial stem via its set screw until nominal chamber zero is vertical.)
Notes: The piston can be used with all PPC cases with necks less than 269.The dial indicator foot is center-recessed to avoid inaccuracies due to slightly protruding fired primers.
The turret/indicator can be used with other calibers
by replacing the 1-inch diameter PPC piston by a Wilson case gauge of the desired caliber or by using a standard 7/8-14 seating die with the optional $5 sleeve as below:
The gauge will arrive set up for a nominal PPC headspace of 0 on the indicator dial face. You may need to adjust for your particular chambering by resetting the bezel (the moveable outer ring). Your nominal head-to-shoulder length can be inferred from fire-formed cases and from bolt feel. (For aesthetics you may wish to adjust slightly the depth of the dial stem via its set screw until nominal chamber zero is vertical.)
Notes: The piston can be used with all PPC cases with necks less than 269.The dial indicator foot is center-recessed to avoid inaccuracies due to slightly protruding fired primers.
The turret/indicator can be used with other calibers
by replacing the 1-inch diameter PPC piston by a Wilson case gauge of the desired caliber or by using a standard 7/8-14 seating die with the optional $5 sleeve as below:
Ordering: The AccuGauge can be ordered by emailing Chuck MacCluer at the address chuck@6mmPPC.com with your Visa/Mastercard info. You may also order in one step via PayPal.
Cost: $90 including shipping to the U.S.. The match price is $80 when picked up. $107 shipped to Europe.
AccuGauge
Readjust sizing die without using bolt feel
The problem: When fired, PPC cases expand in head-to-shoulder length from at least 0.0005 to over 0.002 and must be setback by a resizing die to approximately 0.00025 to 0.0005 below the nominal length. This proper setback is found by a hit-or-miss procedure of experimenting with the die seating depth until the bolt closes on resized cases with a slight resistance. This setting must be changed as the brass ages to obtain the proper setback, otherwise your cartridge handing is affected and over-pressure spitting of impacts will occur.
But with the AccuGauge, once your nominal headspace is determined once and for all, each fired case can be quickly (in one second) checked for over pressure or ageing, and resized cases checked for proper setback. Dies can be quickly reset for rifle changes by consulting the recorded setback for that rifle. Here is how the gauge is used:
Readjust sizing die without using bolt feel
Observe which cases are ageing more rapidly
Spot over pressure
The problem: When fired, PPC cases expand in head-to-shoulder length from at least 0.0005 to over 0.002 and must be setback by a resizing die to approximately 0.00025 to 0.0005 below the nominal length. This proper setback is found by a hit-or-miss procedure of experimenting with the die seating depth until the bolt closes on resized cases with a slight resistance. This setting must be changed as the brass ages to obtain the proper setback, otherwise your cartridge handing is affected and over-pressure spitting of impacts will occur.
But with the AccuGauge, once your nominal headspace is determined once and for all, each fired case can be quickly (in one second) checked for over pressure or ageing, and resized cases checked for proper setback. Dies can be quickly reset for rifle changes by consulting the recorded setback for that rifle. Here is how the gauge is used:
A fired or sized case is inserted into the piston
The assembly is inserted into the turret
