Benefits of RAM Priming?

drvrage

drvrage

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The Lyman reloading manual says that primer position uniformity make a big difference and that the best means to ensure this is ram priming.


Does anyone here use ram priming? How important is this really.

Does anybody here not use ram priming? Why? What are your results.
 
I use the Lee ram priming accessory and I love it. I tried the hand priming tools and the built in priming arm on my press (RCBS Rock Chucker) but for me the ram primer is the way to go. I feel a much more positive feedback when the primer is properly seated and it's incredibly consistent.

True, it's not as fast as the auto feeding hand held primers, but for me it's a more than reasonable tradeoff. It forces me to focus on each individual priming operation.
 
But does the consistent placement of the primer really make a difference in groupings?
 
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The best priming method IMO is still with a hand priming tool, as it allows for feel. By doing away with priming on the press, I resolved a misfire problem with my .444. Blamed it on a thicker primer cup wall (CCI), but the press was very slightly deforming them. No problems since switching to a cheap Lee hand primer which has a lot of advantages over a bunch of similar tools - the span when it's open is a lot less than the RCBS and is a lot more comfortable to use. Use a primer pocket uniformer first and debur the flash holes, and the primer position is the same every time. Besides, it's the best way to "feel" when pockets are starting to loosen.
 
I don't like ram priming. It is not sensitive enough to feel the primer seat and makes it easier to push a primer in too much (Presses produce a great deal of power).
 
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