RCBS AmmoMaster 2 Single Stage Reloading Press - Manual (Page 5)

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4. Insert appropriate Shell Holder (not supplied) into
RAM Priming Body. Photo 8
Photo 8
5. Assemble large or small Primer Rod Assembly as
appropriate. To assemble the Primer Rod
Assemblies: Select the correct primer plug and
sleeve (large or small). Drop the primer plug
through the sleeve. Place the spring on top of the
primer rod. Screw the primer plug into the top of the
primer rod. Tighten the assembly with a small nail or
straightened paper clip through the hole in the
primer plug. Do not over-tighten. Place assembly
into Holder. Photo 9
Photo 9
6. Position the ram at the top of its stroke. The Primer
Plug Assembly should come to rest extending
approximately ½ inch above the Shell Holder. Photo
10.
Photo 10
To prime, with clean dry oil free hands, simply place the
primer into the extended Primer Rod Assembly, photo
11. Raise the operating handle of the press slightly, so
that the Primer Rod Assembly has dropped below the
level of the Shell Holder. Insert a deprimed cartridge
case, photo 12 and lower the operating handle until the
primer is seated.
Photo 11 Photo 12
Proper primer seating requires that the primer be seated
between .002 inch and .004 inch below the case head.
Both insufficient and excessive primer seating depth
greatly decrease primer sensitivity and can result in
misfires. Due to the mechanical advantages of most
presses, it is possible to over-seat or crush primers
during seating. Great care must be exercised until you
learn the proper “feel”.
The second and perhaps more precise method of primer
seating, known as “seating primers to a positive stop,” is
as follows:
7. Repeat steps 1 – 6.
8. Loosen the Hex Lock Nut and unscrew the Ram
Priming Body approximately ½ inch until proper
primer seating is achieved exactly at the end of the
ram stroke. Proper adjustment can be achieved
only by trial and error.
Subsequent primer seating depth using this second
method will vary only as much as the variation in the
rim thickness of your cartridge cases.
Again, priming should be accomplished following either
procedure precisely.