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Rifles, Reloading, Optics, Equipment
Reloading
SD's and ES's??????? Help!!
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<blockquote data-quote="SBruce" data-source="post: 429182" data-attributes="member: 21068"><p>You're Welcome, but I really can't answer about 7mm and 30's because so far, all of my long range and benchrest experience is with 22's, 6mm's and 25 calibers.</p><p> </p><p>Kirby Allen is building me a 300 WSM as we speak though.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p> </p><p>With the smaller calibers and way way lower BC's, I've always tried to keep the ES under 30 fps (not often successfully), measured over at least 10 rounds, but usually more like 30 rounds.......I figured that ES under 30 automatically and generally means a low SD also (I never had a chrony that would calculate SD, so I had to do it manually if I wanted that info) </p><p> </p><p>However, if I was getting good groups at extended ranges, I never even bothered with it; I just shot the guns at the ranges I planned on using them at, recorded POI and conditions, and had fun. I figured that 1/2 moa under good conditions, off the bench was plenty good for hunting purposes........better than I can shoot under hunting/field positions and conditions for sure, and I knew for a fact where they were shooting under different temps/conditions that way too.</p><p> </p><p>Phorwath had given a great explanation of SD's however, and I am assuming that has answered your original Q's??</p></blockquote><p></p>
[QUOTE="SBruce, post: 429182, member: 21068"] You're Welcome, but I really can't answer about 7mm and 30's because so far, all of my long range and benchrest experience is with 22's, 6mm's and 25 calibers. Kirby Allen is building me a 300 WSM as we speak though.:D With the smaller calibers and way way lower BC's, I've always tried to keep the ES under 30 fps (not often successfully), measured over at least 10 rounds, but usually more like 30 rounds.......I figured that ES under 30 automatically and generally means a low SD also (I never had a chrony that would calculate SD, so I had to do it manually if I wanted that info) However, if I was getting good groups at extended ranges, I never even bothered with it; I just shot the guns at the ranges I planned on using them at, recorded POI and conditions, and had fun. I figured that 1/2 moa under good conditions, off the bench was plenty good for hunting purposes........better than I can shoot under hunting/field positions and conditions for sure, and I knew for a fact where they were shooting under different temps/conditions that way too. Phorwath had given a great explanation of SD's however, and I am assuming that has answered your original Q's?? [/QUOTE]
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SD's and ES's??????? Help!!
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