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Rifles, Reloading, Optics, Equipment
Reloading
Question about SD, ES, and accuracy
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<blockquote data-quote="Korhil78" data-source="post: 870344" data-attributes="member: 34818"><p>I have not used a chrono in a while actually. I will tell you how my load development went with my 338 LM.</p><p> </p><p>I loaded up the test loads, shot them and found the most accurate load out of them all. Went .5 gr above and below that load to see if I could squeeze more accuracy out. Took the most accurate out of those and played with the seating depth a little to see if I could tighten it up anymore. I was doing all of this out at 500 yards after the first initial testing though and on calm days. </p><p> </p><p>I loaded up my final load and zeroed it at 100 yards. I went out and verified my drops starting at 300 yards all the way back to a mile. Played with the velocity in shooter along with a few other tweeks in shooter to match my drops exactly. I dont know what my ES and SD is. Heck, I don't even know what my velocity from a chrono actually is. But man my gun is shooting some tight groups out at 1000 and beyond and I couldn't be happier.</p><p> </p><p>If your gun is shooting accurate out at long range and doing so consistently, I dont really believe that ES and SD matter a whole lot. Consistency of accuracy is my main thing that I worry about.</p><p> </p><p>You do need to make sure that you are not shooting at too high of a pressure though. That can mess with how consistent you are and the life of your brass. Find a node that isn't over pressured and stretch it out to see if it is consistent in the accuracy department. Remember that speed isnt everything. If you have a 2900-2950 fps load that shows no pressure and shoots consistently accurate, I would take that over a half way decent load that goes 3000 fps anyday. </p><p> </p><p>Your load being consistently accurate will do VOLUMES to boost your shooting confidence. And confidence is a big deal in this sport.</p><p> </p><p>I am shooting a 300 gr berger out of a 26" tube and to match my drops, shooter says that my velocity is 2810 fps. I am shooting 93gr of H1000. I dont get any ejector marks on my brass or any sign of pressure unless I shoot in temps 80 degrees or above so I am right on the edge of the pressure/no pressure area. I bet if I chrono'd my load it would be pretty close to the 2810 fps but I dont know.</p></blockquote><p></p>
[QUOTE="Korhil78, post: 870344, member: 34818"] I have not used a chrono in a while actually. I will tell you how my load development went with my 338 LM. I loaded up the test loads, shot them and found the most accurate load out of them all. Went .5 gr above and below that load to see if I could squeeze more accuracy out. Took the most accurate out of those and played with the seating depth a little to see if I could tighten it up anymore. I was doing all of this out at 500 yards after the first initial testing though and on calm days. I loaded up my final load and zeroed it at 100 yards. I went out and verified my drops starting at 300 yards all the way back to a mile. Played with the velocity in shooter along with a few other tweeks in shooter to match my drops exactly. I dont know what my ES and SD is. Heck, I don't even know what my velocity from a chrono actually is. But man my gun is shooting some tight groups out at 1000 and beyond and I couldn't be happier. If your gun is shooting accurate out at long range and doing so consistently, I dont really believe that ES and SD matter a whole lot. Consistency of accuracy is my main thing that I worry about. You do need to make sure that you are not shooting at too high of a pressure though. That can mess with how consistent you are and the life of your brass. Find a node that isn't over pressured and stretch it out to see if it is consistent in the accuracy department. Remember that speed isnt everything. If you have a 2900-2950 fps load that shows no pressure and shoots consistently accurate, I would take that over a half way decent load that goes 3000 fps anyday. Your load being consistently accurate will do VOLUMES to boost your shooting confidence. And confidence is a big deal in this sport. I am shooting a 300 gr berger out of a 26" tube and to match my drops, shooter says that my velocity is 2810 fps. I am shooting 93gr of H1000. I dont get any ejector marks on my brass or any sign of pressure unless I shoot in temps 80 degrees or above so I am right on the edge of the pressure/no pressure area. I bet if I chrono'd my load it would be pretty close to the 2810 fps but I dont know. [/QUOTE]
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Question about SD, ES, and accuracy
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