Ok I know about the(DH) dead horse thing and no need to reply if you've heard this before. I get it. I was just asked to post my test results, so here goes.
I'm just reporting on my primer testing. I've been seating by "feel" now and have some results. First I'm using and testing with Lapua SR 6.5 Creedmoor brass only, so far. In the beginning I was seating my primers to around .004"-.005" below the head surface, with good results not only down range on target, but with a chronograph too. Now by seating them, as to bottom them out in the primer pockets, by feel I'm measuring .009"-.013" depth below the heads. These dimensions are from none uniformed pockets. The results from my testings have showed a small improvement. So it does work better IMO to seat the primers until they completely bottom out in the pockets. This "completely" bottoming out process means that the cup is bottomed out and the 3 prong anvil is then recessed up into the cup, by a small amount. In testing I have also seen a difference in the way the primer pockets look after being deprimed. By this I am referring to the powder burn. They used to have a solid carbon build up in the bottom of the pockets, now they have the carbon deposit with 3 distinctive anvil marks left in them, showing brass at the bottom of the pockets. To me this indicates that the anvils are touching the bottom of the pockets firmly. I wish that someone would have explained this to me sooner, as to the depth below head surface in thousands and possible anvil marks left in the carbon deposit after depriming. Anyways I hope that I have described this in a manner of some help .Also if you guys have never tried Sellier & Bellot primers, and have a Cabela's near you, I would strongly suggest giving them a try against your best load by just changing primers. Check out the results down range and on your chronograph. Have a good one. Larry
I'm just reporting on my primer testing. I've been seating by "feel" now and have some results. First I'm using and testing with Lapua SR 6.5 Creedmoor brass only, so far. In the beginning I was seating my primers to around .004"-.005" below the head surface, with good results not only down range on target, but with a chronograph too. Now by seating them, as to bottom them out in the primer pockets, by feel I'm measuring .009"-.013" depth below the heads. These dimensions are from none uniformed pockets. The results from my testings have showed a small improvement. So it does work better IMO to seat the primers until they completely bottom out in the pockets. This "completely" bottoming out process means that the cup is bottomed out and the 3 prong anvil is then recessed up into the cup, by a small amount. In testing I have also seen a difference in the way the primer pockets look after being deprimed. By this I am referring to the powder burn. They used to have a solid carbon build up in the bottom of the pockets, now they have the carbon deposit with 3 distinctive anvil marks left in them, showing brass at the bottom of the pockets. To me this indicates that the anvils are touching the bottom of the pockets firmly. I wish that someone would have explained this to me sooner, as to the depth below head surface in thousands and possible anvil marks left in the carbon deposit after depriming. Anyways I hope that I have described this in a manner of some help .Also if you guys have never tried Sellier & Bellot primers, and have a Cabela's near you, I would strongly suggest giving them a try against your best load by just changing primers. Check out the results down range and on your chronograph. Have a good one. Larry
