Hornady Lock-N-Load Concentricity Tool User Manual

Hornady® Lock-N-Load™ Concentricity Tool

4 5 6

8

9

10

11

12

13

1415

7

321

DIAL INDICATOR SPINDLE

1.

O-RING HOLDS

2.

DIAL INDICATOR FACE LOCK

3.

DIAL INDICATOR

4.

BULLET SPINDLE

5.

BULLET SPINDLE SPRING

6.

BULLET SPINDLE COLLAR

7.

BALL KNOB

8.

DIAL INDICATOR LOCK SCREW

9.

NYLON-TIPPED THUMB SCREW

10.

CRADLE LOCK

11.

FRAME

12.

INDICATOR/STRAIGHTENING CRADLE

13.

CASE HEAD SPINDLE LOCK

14.

CASE HEAD SPINDLE

15.

Instruction Sheet

Setup

The Hornady® Lock-N-Load™ Concentricity Tool ships
pre-assembled with a bullet spindle (5) that will work for
most applications. However, if a smaller or larger spindle
(included) is required, simply unscrew the ball knob (8),
remove the bullet spindle (5), bullet spindle spring (6) and
bullet spindle collar (7), then place the spring and collar on
the spindle of your choice and reassemble in the frame.

Place the dial indicator (4) in the dial indicator hole located
on the indicator/straightening cradle (13). Secure the dial
indicator by tightening the dial indicator lock screw (9) to
hold the dial indicator (4) in position.

Pull the dial indicator spindle (1) back and slide the o-ring
holds (2) down to hold the dial indicator spindle (1) from
protruding too far into the indicator cradle opening. Also,
back the nylon-tipped thumbscrew (10) out of the indica­tor cradle opening. This will allow the first cartridge to be
easily inserted into the Hornady® Lock-N-Load™ Concen­tricity Tool.

Loosen the case head spindle lock (14) and slide the case
head spindle (15) rearward.

Place selected cartridge case head in the case head spindle
(15) and slide the spindle forward guiding the bullet into

the recess in the bullet spindle (5). Continue to push the
cartridge forward until the ball knob (8) moves approxi­mately 1/8 inch away from the frame (12) (this 1/8 inch is
a place to start and may be increased or decreased to the
user’s preference). Now, lock the case head spindle (15) in
place by tightening the case head spindle lock (14).

Cartridges can now be removed and replaced by pulling
the ball knob (8) away from the tip of the cartridge which
will create clearance between the bullet spindle (5) and tip
of the cartridge.

Slide the o-ring holds (2) on the dial indicator spindle (1)
back to allow spindle to come into contact with the bullet.

Loosen the indicator/straightening cradle (13) by loosening
the cradle lock (11), then slide the cradle until the indica­tor is located where the ogive meets the shank of the
bullet. (This position can be adjusted according to bullet
design and/or user preference). Now tighten the indicator/
straightening cradle (13) with the cradle lock (11).

Adjust the o-ring holds (2) on the dial indicator spindle (1)
so that the spindle only drops .020" to .030" when the car­tridge is removed from the concentricity tool. This allows
the cartridge to be removed and replaced easily.

Operation

Straightening Cartridges

At this point you are ready to start inspecting and, if needed,
correcting cartridge concentricity.

Place a cartridge in the tool and rotate to indicate run-out.

Note: If the bullet spindle (5) rotates with cartridge, hold ball
knob (8) to keep it from rotating, as the cartridge MUST rotate
between stationary centers to deliver an accurate measure­ment.

Set the dial indicator (4) to zero at the cartridges lowest setting
by loosening the dial indicator face lock (3) on the side of indi­cator and rotating the face, or by loosening the dial indicator
lock screw (9) and adjusting the indicator in or out.

WARNINGS:

Reloading is an enjoyable and rewarding hobby that is easily conducted with
safety. Carelessness or negligence can make any hobby, especially reloading,
hazardous. All Hornady® reloading tools and supplies are designed with the
user’s safety in mind. However, since Hornady® Mfg. Co. has no control over the
manner in which products or components are used in the reloading operation,
it cannot assume any liabilit y for damage, which may result from the use of the
products or the information given herein. It is the responsibility of you, the user,
to follow generally accepted safety practices.

Use all reloading tools and supplies as the manufacturer recommends. Study
the instructions carefully and become thoroughly familiar with the operation of
those tools and supplies.

Observe good housekeeping in the reloading area. Keep all tools and supplies
neat, clean and orderly. Promptly clean up all primer and powder spills.

With the cartridge at its lowest point on the dial indicator (4),
bring the nylon-tipped thumbscrew (10) into contact with the
bullet applying pressure. Watch the indicator and take past the
cartridge’s high point on the dial indicator (4) and then release
the nylon-tipped thumbscrew (10). Re-measure concentric­ity and repeat the process if necessary. The amount of force
required to correct the cartridge is determined by multiple
factors.

Best accuracy is generally achieved when cartridge concentric­ity is no more than .002"-.003".

Know your components. Study manufacturers’ manuals to properly identify all
components and use them according to their recommendations.

Perform all tasks relative to reloading only when you can give it your com­plete attention. Do not perform these activities when you are ill, fatigued, or
distracted. Develop a routine to avoid mistakes and haste.

Always wear eye protection. You assume reasonable risk during most reloading
related tasks and doing so without safety glasses is adding an unnecessary
additional risk.

Use only laboratory tested and approved reloading and component data and
reloading procedures. We highly recommend the Hornady® “Handbook of Car­tridge Reloading” in its most current Edition as your source for the most modern
and current information.

1-308-382-1390 | PO Box 1848 | Grand Island, NE 68802 | hornady.com

07/09 #780023i