• 4 • • 5 •
of the firing pin blow. This, in turn, effects the ignition of the
primer and may affect the accuracy of the cartridge.
The Uniformer Tool is factory set to S.A.A.M.I. specifications for
rifle primers and is fixed in place. NO ADJUSTMENTS ARE
NEEDED OR SHOULD BE ATTEMPTED!
To use the Primer Pocket Uniforming Tool, insert the primer
pocket of an empty, deprimed case. Be sure to hold the case
straight in line with the Uniforming Tool. Hold case over tool
while applying light pressure. Hold case over cutter and remove
material until the head of the case makes contact squarely
against the stop collar on the Uniformer Tool. Remove the case
from the cutter and check the pocket for brass shavings.
Remove any shavings that are found. If no material is removed,
the pocket is already at the correct depth. Military cases have
crimped-in primers. Lyman's Primer Pocket Reamer should be
used first to remove the crimp and then the Uniformer Tool can
be used as described above.
WARNING:
• Do not adjust stop collar.
• Large Rifle and Large Pistol Primers have different pocket
depths.
•Do not use the Large Rifle Uniformer in pistol cases.
• Holding the Uniforming Tool at an angle in the primer pocket
could enlarge the pocket and cause gas leakage.
•Keep tool square and in-line with the case.
•Primer Pocket Reamer Small and
Large:Removes military crimps and
rough metal edges from primer pock-
ets. The tool requires only a few sec-
onds to work properly. Be sure to hold
case square with the reamer. Holding
unit at an angle in the primer pocket
could enlarge the pocket and cause
gas leakage.
INDIVIDUAL TOOL INSTRUCTIONS
• Inside Deburr (VLD) Tool:
This tool eliminates damage caused by
sharp edges on the case neck. It cuts a
gentle 22 degree chamfer on the case
mouth allowing bullets to easily enter the
cartridge. This tool only requires a few
seconds to properly function. Do not over
cut brass as this will lead to thin weak
necks. Works on cartridges from 17cal. -
45cal.
• Outside Deburr Tool:
This tool removes excess brass from
trimmed cases. The tool easily deburrs
the outside case mouth to leave a
smooth even finish. This tool only
requires a few seconds to properly func-
tion. Do not over cut brass as this will
lead to thin weak necks. Works on car-
tridges from 17cal. - 45cal.
• Primer Pocket Uniformer Small and Large:
The Lyman Primer Pocket Uniformer Tool is designed to cut rifle
primer pockets to a uniform depth that can produce more con-
sistent ignition and lead to greater accuracy. The Primer Pocket
Uniformer cuts to a uniform depth and at the same time
squares the seating surface for the anvil of the primer. Primers
are constructed so that the anvil protrudes slightly from the
open end of the primer cup. This is nec-
essary so that the anvil will rest firmly on
the bottom of the primer pocket. When
the firing pin strikes the primer, the
impact sensitive compound inside the
primer is crushed between the anvil and
cup causing the compound to ignite.
Variations in the depth or configuration of
the primer pocket, or in the primer seat-
ing operation itself, can alter the effects
