Dillon Precision SL 900 User Manual
Page 15
Finished Shotshell Dimensions
Wad Guide/Swing Arm
Assembly
#16802 - 12 gauge shown
Here are some dimensions of a typical 12ga. shotshell.
Always use a quality dial caliper when measuring your
shotshells. Length may vary dependent upon shotshell
manufacturer. Dimensions shown are for maximum,
uncrimped overall length. If you find it necessary to adjust the
collet size die, try to shoot for a middle of the road measure of
the brass base.
Wad Seated Depth
When developing loads for
shotshells be aware of your “wad
seated depth.” Here’s a reference
guide for the popular wad and
shot weight used presently.
Example, if your loads currently
use a wad for 1 1/8 oz. of shot
and you decide to reduce your
shot weight and switch to 7/8 of
an ounce wads, readjust the shot
dispenser tube via the body collar
adjustment screw. Clockwise
rotation raises the shot dispenser
tube and decreases the depth the
wad is seated into the shotshell.
Counterclockwise rotation lowers
the shot dispenser tube and the
wad will get seated deeper into
the shotshell.
Finished Round Information
Your loaded round length will
vary due to loads used, type of
wads, and brand of shotshells.
We found that a majority of the
Winchester ammo loaded fell
toward 2.30 - 2.325 length.
The Remington and Federal
ammo loaded measured 2.33 -
2.350 overall length.
Always use a reputable loading
manual when reloading
shotshells.
.800-.809 Dia.
typical base
diameter
2.76 -.100
seated depth
.065
2.30 -
2.350
overall
length
16681
16678
NOTE: Periodically
lube this sleeve with
light oil.
16677
16680
13840
16682
17604
17352
16679
Wad & Shot Approx. Depth
7/8 - 1 oz.
1.12 - 1.20
1 1/8 oz.
1.30 - 1.35
1 1/4 oz.
1.45 - 1.50
13789
Part #
Description
13789 1/4-28 Set Screw
13840 Hitch Pin Clip
16677 Wad Swing Arm
16678 Wad Guide Sleeve
16679 Sleeve Compression Spring
16680 1/16 x 1/2 Roll Pin
16681 Wad Guide
16682 Swing Arm Torsion Spring
17352 Spring Button
17604 Clevis Pin
15
SL 900, May 2007 5/21/07 11:51 AM Page 15