Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Opinion on primer seating? What is your depth?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Mikecr" data-source="post: 1914370" data-attributes="member: 1521"><p>Way better than a Lee or common hand primer tool.</p><p></p><p>The Co-Ax system shown sets the primer flush or 4-6thou beyond casehead. Whether this is consistent & best would depend on pockets AND primers being same & correct. Maybe their manual addresses that somewhere.</p><p></p><p>The K&M accounts for both individual pocket depth and individual primer height at the same time. It is zero'd for each case/primer just prior to seating. It doesn't address resultant primer depth below casehead, because that doesn't matter, provided it is at least below flush and reasonably same.</p><p>There are a lot of <em>super</em> primer seaters out there marketing on feel, or precision click settings. None of these do what the indicated K&M does, because none of them actually measure anything.</p><p></p><p>The function of setting crush is to pre-sensitize primers consistently.</p><p>Most probably think 'I smash em in there & they go off, so my method works'.</p><p>Well yeah, it works to set them off. Primers are ~99.9997% reliable in that regard.</p><p>But, there is no 'good' in striking primers with greater/lesser energy, or better/worse striking precondition, than <u>optimum</u>. </p><p>We find optimum, for anything, through testing and measurements.</p><p></p><p>You've probably done it or seen where folks swap primers to find whatever seems best. That's pretty abstract, right? And they're all going bang, so what does it matter? Well, it matters when you see one primer printing tighter groups than the others. It can matter enough that we should do it.</p><p>Now, if you reviewed the outcome of many people doing this you would see no trend. There is no primer better than others really. It just happens that this 6BR shooter found FEDs working best, while another landed on CCIs.</p><p>It's my contention that this is because the 6BR-FED striking system is closer to optimum for FEDs, and this must be further from optimum for CCIs. I believe he could adjust his striking to reach best with CCIs, if he really really wanted to. But it would not be easy, -especially while his primer seating is erratic at best, and contributing to this abstract.</p><p>By seating primers to a crush standard, as actually measured (every one), you're reducing one abstract in this for sure.</p><p></p><p>I was forced to undergo striking adjustments once, when a firing pin had slipped under it's set-screw. I could not tell where the pin was originally set. So with my developed load that always shot well (before pin slip), I adjusted pin setting, shot groups, repeat, until finding the right setting. This was no fun.</p><p>All primers went bang, but groups opened closed opened, and I definitely found optimum. </p><p>Ended up one of the single biggest gains I ever made with that gun. A full 1/8moa better, taking me from 3/8 to 1/4, which I would never have reached any other way. Ok, no fun, but worth it!</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1914370, member: 1521"] Way better than a Lee or common hand primer tool. The Co-Ax system shown sets the primer flush or 4-6thou beyond casehead. Whether this is consistent & best would depend on pockets AND primers being same & correct. Maybe their manual addresses that somewhere. The K&M accounts for both individual pocket depth and individual primer height at the same time. It is zero'd for each case/primer just prior to seating. It doesn't address resultant primer depth below casehead, because that doesn't matter, provided it is at least below flush and reasonably same. There are a lot of [I]super[/I] primer seaters out there marketing on feel, or precision click settings. None of these do what the indicated K&M does, because none of them actually measure anything. The function of setting crush is to pre-sensitize primers consistently. Most probably think 'I smash em in there & they go off, so my method works'. Well yeah, it works to set them off. Primers are ~99.9997% reliable in that regard. But, there is no 'good' in striking primers with greater/lesser energy, or better/worse striking precondition, than [U]optimum[/U]. We find optimum, for anything, through testing and measurements. You've probably done it or seen where folks swap primers to find whatever seems best. That's pretty abstract, right? And they're all going bang, so what does it matter? Well, it matters when you see one primer printing tighter groups than the others. It can matter enough that we should do it. Now, if you reviewed the outcome of many people doing this you would see no trend. There is no primer better than others really. It just happens that this 6BR shooter found FEDs working best, while another landed on CCIs. It's my contention that this is because the 6BR-FED striking system is closer to optimum for FEDs, and this must be further from optimum for CCIs. I believe he could adjust his striking to reach best with CCIs, if he really really wanted to. But it would not be easy, -especially while his primer seating is erratic at best, and contributing to this abstract. By seating primers to a crush standard, as actually measured (every one), you're reducing one abstract in this for sure. I was forced to undergo striking adjustments once, when a firing pin had slipped under it's set-screw. I could not tell where the pin was originally set. So with my developed load that always shot well (before pin slip), I adjusted pin setting, shot groups, repeat, until finding the right setting. This was no fun. All primers went bang, but groups opened closed opened, and I definitely found optimum. Ended up one of the single biggest gains I ever made with that gun. A full 1/8moa better, taking me from 3/8 to 1/4, which I would never have reached any other way. Ok, no fun, but worth it! [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Opinion on primer seating? What is your depth?
Top