Primer seating crush, how much is right?

[maxpower]

After looking over a bunch of 6.5x284 brass, I noticed my primers were seated deeper than a fellow shooters, who I was comparing cartridges with. I did some measurements and found I was crushing primers (Wolf/Russian LRPs) about .006" with good results, while he was only crushing them .002". He used a K&M primers seater gauge to get his measurments. I have read that .003" crush is about right with LRPs, has anyone looked into this, especialy with the Wolf LRPs? Is .005-.007" crush excessive?

 

[Travelor]

I use an RCBS Bench primer seater and let the primer tell me when if it enough. You can feel the primer "bottom out". If I had a tool such as yours, I using a primer pocket uniformer, then I would seat one by feel, then adjust my tool to that depth.

 

[maxpower]

I thought the primers was telling me when enough is enough and about 6-7 thou felt right. Maybe my big fists were a bit too eager. I dont realy have time to experiement with primer crush at the moment, but I might in the future. I might crony some loads with .002" -.003" crush and see if I can pick any difference with .006-.007" crush.

 

[holstil]

I seat mine til they stop plus a little crush, I think that's about .010" to .012 below the case. The only time I ever had a misfire, was when I was reading how far I should seat my primers and did the .002" to .003" thing. I think most firing pins protrude .030" or more. FWIW
Jim