Take it to market Keith.  I'm looking for something less than $600 to seat primers. Lol

I seat all my primers on my Dillon XL650. In fact now that my load development is finished, I load the final product on my XL650 too. Until this video I had never heard of primer crush.  
The load for my 308 bolt gun is perfect so I won't be changing how I seat primers.  With that said,  I find this very interesting.

Fact is 99+% of all shooters don't have the skill to have much difference in the end. I use an old Lee hand primer. I squeeze it firmly , make sure they're not proud and forget about it. Still get consistent groups under 1/2"@100 yds

I like the theatrical B-roll. Especially, the splashing powder. 👍🏻

Good timing on this. I just watched the Primal Rights interview Corrina just released about the primer seater.

Your test confirms my suspicions. Thank you for these videos, very well done!

I use a Lee press to seat my primers. I have never measured the crush...never thought that was a thing. It does seem that I seat mine until they are just below the base of the case.

Great topic and I honestly based on your background and experience you will get us something better than the CPS and even if its the same price or a bit more it will do it :) Talking about diving in deep ;) Best of luck! BTW - love your content :)

Interesting experiment, and gives me an idea for another test.  Primer crush (aka, "reconsolidation" and "setting the bridge") recommendations from U.S. makers and experiments by NOSIH suggest improvement in primer ignition performance by compressing the anvil a couple or three thousandths.  However, the Russian primers, specifically, and despite their burred and hard-to-seat cups, have garnered an enviable reputation for minimizing velocity spread, often outperforming Federal 210Ms and others in that regard.  It makes me wonder if the Tula plant set the bridge during the primer manufacturing process rather than leaving it for the ammunition loader to do.  So a repeat with some CCI or Federal, and especially Remington and Winchester, might bring different results. I don't know, but it would be fun to find out.

(Remington and Olin were the outfits that recommended reconsolidation numbers to McDonnell Douglas for government projects in document MDC A0514 Rev. A in 1970, that NOSIH reviewed and modified for small primers from 0.002-0.006" reconsolidation to 0.002-0.004" reconsolidation in Rev. B in 1982.)

My question would be if primer seating should be tuned much like bullet seating depth or powder charge weight. Paying more attention to priming seems like a logical progression once powder is tuned, bullet is tuned, and cases are uniform.

In my own testing... Consistent seating is more important than how deep they're seated. Personal preference here, but I'm only willing to sort and test a certain number of things. The list of "things" varies some based on use case, but I pick the 2-3 most important (in my opinion) for the discipline.

Seems like the F-class community is talking about primer seating this week. Cortina just interviewed the primal rights guy

I wish you the best on the primer seating tool I was trying to figure out how to make a 21st-century hand, priming tool mounted in some device to make it a bench mounted tool.

Interesting test. Now I’ll start paying more attention when I’m priming. Do you believe your results would be the same for my rifle? Or is it like bullet seating depth, different for each barrel?

How did you measure the amount of "crush"?

Which primer seat did you use for this test? Thx!

Are you making a precision primer bench mounted tool, I have been trying to find a bald eagle precision priming tool but no one has one in stock, crazy.

Hi Keith. When you sryjust touching the bottom of the pocket. Do you mean the primer cup or the spider thingy that protrudes a few thou before seating? I use a Primal rights bench mounted seater and currently seat until the primer cup touches bottom of pocket. Is this correct from your findings?

I'm confused.  You said that as the crush increased,  the average velocity decreased,  but as you increased the crush that ES and SD increased.
So what I'm taking from that is that you achieved better extream spread in velocities but on paper it got worse? To me that just means that you would need to follow with seating depth?

Hi Kieth
I'm late to this party
How does Lyman’s Accu-Prime Auto Load tool look to you?
It indexes the seating depth off the case base not the case rim.