Dillon Precision SL 900 Instruction Manual

Using a fired hull, measure the diameter of the
brass base. Place the hull into the machine’s
shellplate at station one and resize the hull. Remove
the hull from the machine and again measure the
diameter. The brass base should be .804 diameter.
Fig. 58  See page 17 for shotshell dimensions.
To make the brass base smaller, turn the die
clockwise using one-quarter turn increments. Using
another fired hull to test the new setting, resize the
hull in the machine. Again, measure the diameter of
the brass...

When reloading with light shot load plastic
wadsit may be necessary to adjust the shot
dispenser position. Rotate the body collar
adjustment screw (#16736) clockwise to raise the
shot dispenser. Tighten all the collar screws, then
test the changes. Fig. 63
When reloading with heavy shot load plastic
wadsit may be necessary to adjust the shot
dispenser position. Rotate the body collar
adjustment screw (#16736) counterclockwise to
lower the shot dispenser. Tighten all the screws, then
test the changes.
5....

Example: you’ve just finished making some
rounds using #9 lead shot, the next size you’ll be
using is #7 1/2 lead shot. Remember to always
weigh the shot charge when doing this switch.
Please use a quality scale. Fig. 66
Removing the Toolhead: 
One of the great features on a Dillon machine is
the removable toolhead (#16667). The removable
toolhead (#16667) allows you to convert from one
hull brand to another hull brand or another caliber
in a matter of minutes. Let’s use the following steps
to remove and...

7. Pick up your other toolhead (#16667) and slide
it onto the frame.
8. Insert the two toolhead pins (#14008) into the
holes located on the front and rear of the frame.
9. Install the powder bar return rod (#17350).
10. Install the shot bar return rod (#16733).
11. Attach the shot fitting to the shot dispenser
top (#17142).
12. Install the shot fitting e-clip.
You’ve now completed the toolhead swap – the
only step that remains is refilling the components
(powder and shot) and you’re ready to go again....

8. Insert the shellplate bolt (#13418). Thread the
shellplate bolt until it stops, then loosen it no more
than one-quarter of a turn. Fig. 75
9. Again, move the roller handle (#22183)
halfway down its stroke. 
10. Secure the 1/4-28 brass tipped set screw
(#13923). Refer to Fig. 74
11. Install the ejector wire (#16676). Fig. 76
SWITCHING TOANOTHERPOWDER
Example: you’ve been using brand X powder for
some of your ammo and it’s time to change to brand
Q. Let’s explain how to switch powder.
1. Remove the...

5. Turn the powder system upright and position
the unit over the opening of the powder container
and cycle the powder bar with your thumb. Fig. 79
6. Once the powder system is completely empty,
reinstall the powder system and tighten the two 10-
24 screws using a 5/32” Allen wrench.
7. Reattach the powder bar return rod (#17350).
8. Refill the powder hopper with the new
powder.
9. Please use a quality powder scale to determine
the new powder charge weight.
The Primer System:
The primer feed system on the...

38
A 28 gauge conversion package (#22139),
includes the following items:
1.) A complete toolhead assembly with dies
installed; Station 1, collet sizer & depriming pin
assembly. Station 2, powder die with 28 gauge
powder funnel and retaining clip. Station 3,
complete shot dispenser assembly with 1/2 oz – 1.0
oz shot bar and 28 gauge shot drop tube. Station 4,
starter crimp star/radius form insert. Station 5, new
spring/over floating taper crimp die.
2.) A 28 gauge conversion kit box containing:
(a) one 28...

39
5. Return the roller handle to the up position.
6. Use a 1/4" Allen wrench to unscrew the
shellplate bolt.
7. Remove the shellplate from the machine.
8. Change the locator buttons. First, remove the
locator buttons by pressing and holding the locator
button down. Reach below the platform and rotate
the locator button until it snaps free. Fig. 4Remove
all three locator buttons. Next, retrieve the new
locator buttons from the 28 gauge conversion box.
Place the spring on the locator button, place it...

40
14. Reinstall the ejector wire (#16676). Fig. 7
15. Return the roller handle to the up position.
CASEFEEDASSEMBLYCONVERSION
(RIGHT-REAR OF THE MACHINE)
1. Remove the hulls and the clear casefeed tube
from the machine.
2. Use a 9/64" Allen wrench to remove the screw
and washer on the casefeed sleeve assembly.
Remove the 12 gauge casefeed sleeve off the
casefeed body. Fig. 83. From the 28 gauge conversion box, retrieve the
28 gauge casefeed sleeve and place it on the casefeed
body. Reinstall the...

41
Both 20 and 28 gauge hulls use the small gauge
disc. Fig. 11
5. Install the small gauge disc into the casefeed
bowl. Rotate as needed until the motor driveshaft
enters the slot in the casefeed disc clutch. Fig. 12
6. Reinstall the clear casefeed tube.
7. Test run the assembly by placing 3-5 empty,
once-fired hulls into the casefeed bowl and turn the
unit on. Once all the hulls have been fed into the
clear feed tube, turn the unit off.
8. Move the roller handle up and down until all
the hulls have...