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Rifles, Reloading, Optics, Equipment
Reloading
ES and SD
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<blockquote data-quote="WRG" data-source="post: 327646" data-attributes="member: 13638"><p>There are a lot of things that can have an effect on your extreme spread. I think the most would be how hot the barrel gets during firing. The way I do it is I use a 5 shot group during my work ups. After the first 5 rounds I let the barrel cool completely down before firing the next set. This is because I want all variables to see the same conditions if I'm doing a ladder work up. Even before I start the first set I will fire 2 to 3 fouling rounds before I start the work up because my barrel is clean before I start.</p><p> </p><p>Now if all my rounds were the same I would still do a 5 set shot then cool the barrel. Then I'll compare the ES of each set. I think this gives a more accurate result as to how the round is performing. All my rounds are typically for a hunting application and not compitition so if I saw an ES of 22 fps that would be concidered exceptable. Now if I was setting up for compitition I would be looking for something under 10 fps and aiming for 5 fps or under.</p><p> </p><p>If you want to bring down that 22 fps, how maticulous you are with your case prep will help. Of course trying other powders, primers, bullet seating depth and a list of other things will help with that also but, for a hunting application that would be fine as long as your happy with the accuracy. If you had a 56 in a 5 shot group I would be concerned!</p></blockquote><p></p>
[QUOTE="WRG, post: 327646, member: 13638"] There are a lot of things that can have an effect on your extreme spread. I think the most would be how hot the barrel gets during firing. The way I do it is I use a 5 shot group during my work ups. After the first 5 rounds I let the barrel cool completely down before firing the next set. This is because I want all variables to see the same conditions if I'm doing a ladder work up. Even before I start the first set I will fire 2 to 3 fouling rounds before I start the work up because my barrel is clean before I start. Now if all my rounds were the same I would still do a 5 set shot then cool the barrel. Then I'll compare the ES of each set. I think this gives a more accurate result as to how the round is performing. All my rounds are typically for a hunting application and not compitition so if I saw an ES of 22 fps that would be concidered exceptable. Now if I was setting up for compitition I would be looking for something under 10 fps and aiming for 5 fps or under. If you want to bring down that 22 fps, how maticulous you are with your case prep will help. Of course trying other powders, primers, bullet seating depth and a list of other things will help with that also but, for a hunting application that would be fine as long as your happy with the accuracy. If you had a 56 in a 5 shot group I would be concerned! [/QUOTE]
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