Has anyone done accuracy testing with multiplle X Die use cycles?

IMtheNRA

New member
In my limited testing of the X Die for .223 plinking ammunition, I found that it really does work as advertised and it is no longer necessary to trim brass.

I was wondering of anyone here has data on it's effect on precision rifle ammunition performance following several cycles through the X Die. Specifically, I am interested in changes in case neck tension, velocity consistency, and downrange accuracy.
 
I have one set of ‘X’ dies. It has nothing to do with what I was lead to believe but there were reloaders telling me I would never be required to trim a case again; and I said “fantastic!”. I did not believe them so I called RCBS, it was suggested if the case is trimmed .020” it should not be necessary to trim the case again ‘BECAUSE! After the case length has increased .020” in length it is time to start on another case. They did not say the X die stops case length growth.

And then there is the collets effect on sizing.

F. Guffey

I have one X die set, at the time I had all the dies I was ever going to own and I was not starting over. Dillon said it was OK to use my dies with their press. They suggested I seat on one position and crimp on another when loading pistol. I told them I use the Lock Out Die when loading on a progressive press; meaning the RL550B has 4 position with no room for the lock out die and crimping and seating on different positions.
 
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