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Rifles, Reloading, Optics, Equipment
Reloading
ES and seating depth.
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<blockquote data-quote="DustThroughaFan" data-source="post: 2900275" data-attributes="member: 126551"><p>Some go after seating depth first then go after powder charge and some go after the charge first then go after seating depth. I'm in the latter category. </p><p></p><p>I started out at .020" jump, 2.920" base to ogive, and I'm working backwards. 300winmag, 215 berger hybrid, federal 215m primer, 79gr of N570 in a Norma case. </p><p></p><p>This load went 2913 fps (three shot average) and had an es of 12 but grouped about ¾" </p><p>Okay, seating depth time. </p><p></p><p>Pushing in .003" at a time and at .012" deeper I've gained 47 fps and ES is now 39. As I started pushing the Buller back it grouped about the same ¾" then it opened up a little more but it's going back in the right direction now. Hovering a little over ½"</p><p>I've got two more groups loaded at 2.905" (-.015") and 2.902" (-.018")</p><p></p><p>Can I just back off the charge a little to get the es back or should I go ahead and find the seating depth then go over the charge again? Starting to show a little pressure now.</p></blockquote><p></p>
[QUOTE="DustThroughaFan, post: 2900275, member: 126551"] Some go after seating depth first then go after powder charge and some go after the charge first then go after seating depth. I'm in the latter category. I started out at .020" jump, 2.920" base to ogive, and I'm working backwards. 300winmag, 215 berger hybrid, federal 215m primer, 79gr of N570 in a Norma case. This load went 2913 fps (three shot average) and had an es of 12 but grouped about ¾" Okay, seating depth time. Pushing in .003" at a time and at .012" deeper I've gained 47 fps and ES is now 39. As I started pushing the Buller back it grouped about the same ¾" then it opened up a little more but it's going back in the right direction now. Hovering a little over ½" I've got two more groups loaded at 2.905" (-.015") and 2.902" (-.018") Can I just back off the charge a little to get the es back or should I go ahead and find the seating depth then go over the charge again? Starting to show a little pressure now. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
ES and seating depth.
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