Post by ed alger on Sept 9, 2014 14:47:27 GMT -5
I've been using my RCBS bench mounted priming tool for few months. I've primed small standard pistol, small magnum pistol and large rifle. From day one, I've had trouble priming small pistol as the rod plug would jam and I'd had to remove the top plate to get it put back in place.
I called RCBS and they sent me new parts for the advancing mechanism. The problem has persisted. I believe I now see the cause:
Terminology: APS strip top is the flat side and and receives the primer.
The forked end is the open end which connects to another strip.
The holes in the strip are tapered from top to bottom. As loaded, the primers do not protrude through to the bottom when loaded flush with the top.
The problem cause is two parts:
First, the rod plug does not have a positive extraction but relies on gravity and some side pressure to follow the operating mechanism. (At least this is what I see?).
Second, every small primer strip I have has some degree of mold flash material on the bottom of the strip at the lip of the holes. It's is minute and I could not see it with my 80 year old eyes.
.
The small rod plug measures .161" in diameter slips freely through (most) strip holes. However, the plug binds in holes which have some plastic flash on the bottom.
I fashioned a test tool from brass which measures .168". I discovered that in every one of the 40 small pistol strips, I have, the test tool would not pass thought the forked end nor through the center hole. The forked end has a lot of flash and the center hole is just smaller than the rest of 25 holes. About 20% of the rest of the holes would not pass the test tool.
I used a tapered hand reamer to remove the flash where the test tool would not pass. (Reaming from the bottom)
I called RCBS. While they said they never heard of this problem, they are sending replacement strips.
FWIW.
Ed..
I called RCBS and they sent me new parts for the advancing mechanism. The problem has persisted. I believe I now see the cause:
Terminology: APS strip top is the flat side and and receives the primer.
The forked end is the open end which connects to another strip.
The holes in the strip are tapered from top to bottom. As loaded, the primers do not protrude through to the bottom when loaded flush with the top.
The problem cause is two parts:
First, the rod plug does not have a positive extraction but relies on gravity and some side pressure to follow the operating mechanism. (At least this is what I see?).
Second, every small primer strip I have has some degree of mold flash material on the bottom of the strip at the lip of the holes. It's is minute and I could not see it with my 80 year old eyes.
. The small rod plug measures .161" in diameter slips freely through (most) strip holes. However, the plug binds in holes which have some plastic flash on the bottom.
I fashioned a test tool from brass which measures .168". I discovered that in every one of the 40 small pistol strips, I have, the test tool would not pass thought the forked end nor through the center hole. The forked end has a lot of flash and the center hole is just smaller than the rest of 25 holes. About 20% of the rest of the holes would not pass the test tool.
I used a tapered hand reamer to remove the flash where the test tool would not pass. (Reaming from the bottom)
I called RCBS. While they said they never heard of this problem, they are sending replacement strips.
FWIW.
Ed..
My daughter came from Missouri, my son and grand son, my wife and I had a nice dinner of grilled "porter house" pork chops, corn on the cobb, my son, G'son and I share 10/5. G'son is 4 minutes early though @ 10/4.
Pooh I hope you find to right house . 
