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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Snipe-Tac - Load Evaluation Wanted
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<blockquote data-quote="Just Learnin" data-source="post: 212264" data-attributes="member: 3957"><p><img src="http://i288.photobucket.com/albums/ll184/JustLearnin/Targets6-17-08.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>This photo is of the second day of shooting. I wanted to check the upper node to see if I could narrow it down. All of these shots were in the shade, without mirage, at early morning with minimal wind. Kind of thought I'd get a little tighter groups. Guess that's what I get for thinking...</p><p> </p><p>Anyway, here is the data to go along with the photo.</p><p> </p><p>138gr</p><p>1 3191fps (sighter/fouler)</p><p>2 3189fps (second sighter/fouler)</p><p>3 3164fps</p><p>4 3196fps</p><p>5 3185fps</p><p>6 3209fps</p><p>7 3217fps</p><p>ES = 54fps</p><p>group size = 1.91" or 0.81moa</p><p> </p><p>138.5gr</p><p>1 3197fps</p><p>2 3184fps</p><p>3 3185fps</p><p>4 3209fps</p><p>5 3217fps</p><p>ES = 26fps</p><p>group size = 1.93" or 0.82moa</p><p>w/o flyer = 1.06" or 0.45moa</p><p> </p><p>139gr</p><p>1 3213fps</p><p>2 3225fps</p><p>3 3198fps</p><p>4 3213fps</p><p>5 3215fps</p><p>ES = 27fps</p><p>group size = 2.60" or 1.10moa</p><p>w/o flyer = 1.60" or 0.68moa</p><p> </p><p>139.5gr</p><p>1 3205fps</p><p>2 3210fps</p><p>3 3216fps</p><p>4 3238fps</p><p>5 3223fps</p><p>ES = 33fps</p><p>group size = 2.60" or 1.10moa</p><p>w/o flyer = 1.68" or 0.71moa</p><p> </p><p>140gr</p><p>1 3232fps</p><p>2 3210fps</p><p>3 3225fps</p><p>4 3251fps</p><p>5 3243fps</p><p>ES = 33fps</p><p>group size = 3.8" or 1.62moa</p><p>w/o flyer = 2.1" or 0.89moa</p><p> </p><p>I reported group size with and without the most extreme shot. I do not think I pulled those shots; don't really have any explanation to the flyers...though the flyers for the last three groups were the first shot in each group (in the 138.5gr group it was the third shot). I also noticed that the average velocity was running a little higher from the previous day (18fps on the 138gr, 10fps on the 139gr, and 7fps on the 140gr). The only thing environmentally different was shooting in the sun on the first day and in the shade on the second day.</p><p> </p><p>Any ideas to reduce the extreme spread would also be appreciated. Dave Viers did recommend GM215M primers but I can not locate any so I'm using my WLRM primers for now. I'm fairly consistent with my reloading - not saying I'm great at it but I've been reloading for several years now all the while gleaning handloading techniques from this site. Sure is expensive applying what one learns from here!</p><p> </p><p>Thanks again! -- Don</p></blockquote><p></p>
[QUOTE="Just Learnin, post: 212264, member: 3957"] [IMG]http://i288.photobucket.com/albums/ll184/JustLearnin/Targets6-17-08.jpg[/IMG] This photo is of the second day of shooting. I wanted to check the upper node to see if I could narrow it down. All of these shots were in the shade, without mirage, at early morning with minimal wind. Kind of thought I'd get a little tighter groups. Guess that's what I get for thinking... Anyway, here is the data to go along with the photo. 138gr 1 3191fps (sighter/fouler) 2 3189fps (second sighter/fouler) 3 3164fps 4 3196fps 5 3185fps 6 3209fps 7 3217fps ES = 54fps group size = 1.91" or 0.81moa 138.5gr 1 3197fps 2 3184fps 3 3185fps 4 3209fps 5 3217fps ES = 26fps group size = 1.93" or 0.82moa w/o flyer = 1.06" or 0.45moa 139gr 1 3213fps 2 3225fps 3 3198fps 4 3213fps 5 3215fps ES = 27fps group size = 2.60" or 1.10moa w/o flyer = 1.60" or 0.68moa 139.5gr 1 3205fps 2 3210fps 3 3216fps 4 3238fps 5 3223fps ES = 33fps group size = 2.60" or 1.10moa w/o flyer = 1.68" or 0.71moa 140gr 1 3232fps 2 3210fps 3 3225fps 4 3251fps 5 3243fps ES = 33fps group size = 3.8" or 1.62moa w/o flyer = 2.1" or 0.89moa I reported group size with and without the most extreme shot. I do not think I pulled those shots; don't really have any explanation to the flyers...though the flyers for the last three groups were the first shot in each group (in the 138.5gr group it was the third shot). I also noticed that the average velocity was running a little higher from the previous day (18fps on the 138gr, 10fps on the 139gr, and 7fps on the 140gr). The only thing environmentally different was shooting in the sun on the first day and in the shade on the second day. Any ideas to reduce the extreme spread would also be appreciated. Dave Viers did recommend GM215M primers but I can not locate any so I'm using my WLRM primers for now. I'm fairly consistent with my reloading - not saying I'm great at it but I've been reloading for several years now all the while gleaning handloading techniques from this site. Sure is expensive applying what one learns from here! Thanks again! -- Don [/QUOTE]
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338 Snipe-Tac - Load Evaluation Wanted
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