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New Mexico Antelope Hunt Recap/Antelope Rifle build
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<blockquote data-quote="cb4128" data-source="post: 2614387" data-attributes="member: 80069"><p>I was able to get 150 pieces of new Norma brass for this rifle and started with H1000 and the Berger 115gr VLD's. Below were my chrono results loaded at .040 off the lands, which appeared to be popular for this bullet from my research. I never found pressure but I was towards the top end and really wasn't getting the numbers that I was hoping for with that bullet...</p><p></p><p>50gr - 2,903 fps (clean barrel)</p><p>50.5gr - 2,836 fps</p><p>51.0gr - 2,883 fps</p><p>51.5gr - 2,894 fps</p><p>52.0gr - 2,920 fps</p><p>52.5gr - 2,956 fps</p><p></p><p>Next I tried the 90gr Swift Scirocco II bullet, based on feedback from a buddy raving on their performance in his 240wby. The hardest part here was trying to figure out where to seat the bullet in relation to the lands - as this chamber has too much freebore for this bullet to get anywhere near the lands. I went with the load data straight from my load manual at 3.100" COAL and used H4831sc as I have a good amount and it was towards the top end of the speed according to my manual as well. Chrono details below:</p><p></p><p>52.5gr - 3,195 fps</p><p>53.0gr - 3,194 fps</p><p>53.5gr - 3,227 fps</p><p>54.0gr - 3,280 fps</p><p>54.5gr - 3,313 fps</p><p>55.0gr - 3,388 fps</p><p>55.5gr - 3,404 fps</p><p></p><p>I decided to load up 55.3gr at several different lengths to accuracy test.</p><p></p><p>3.0980" COAL - horizontal stringing, about 3/4" at 100 yards</p><p>3.0950" COAL - only fired 2 shots, were 1.5" apart - all horizontal</p><p>3.0920" COAL - 2 touching, 1 a 1/4" high - a 1/2" group but still wasn't driving tacks like I really wanted</p><p></p><p>*I decided to use this as a backup load, in case I wouldn't have enough time to get another bullet dialed in before my New Mexico Antelope hunt.</p><p></p><p>My BIL with the same reamer had a really good load with the 105gr Berger VLD's. So, I opted to try those out as well with H1000, again at .040 off lands. Below were those chrono results:</p><p></p><p>54.5gr - 3,077 fps</p><p>55.0gr - 3,135 fps</p><p>55.5gr - 3,167 fps</p><p>56.0gr - 3,182 fps</p><p>56.5gr - 3,232 fps</p><p>57.0gr - 3,246 fps (started flattening primers)</p><p>57.5gr - 3,297 fps (increased extraction pressure - flattened primer)</p><p></p><p>I called the 57.5gr about max in this rifle, so backed off to the 55.5-56.0gr node and loaded up some to test at distance at .040 off.</p></blockquote><p></p>
[QUOTE="cb4128, post: 2614387, member: 80069"] I was able to get 150 pieces of new Norma brass for this rifle and started with H1000 and the Berger 115gr VLD's. Below were my chrono results loaded at .040 off the lands, which appeared to be popular for this bullet from my research. I never found pressure but I was towards the top end and really wasn't getting the numbers that I was hoping for with that bullet... 50gr - 2,903 fps (clean barrel) 50.5gr - 2,836 fps 51.0gr - 2,883 fps 51.5gr - 2,894 fps 52.0gr - 2,920 fps 52.5gr - 2,956 fps Next I tried the 90gr Swift Scirocco II bullet, based on feedback from a buddy raving on their performance in his 240wby. The hardest part here was trying to figure out where to seat the bullet in relation to the lands - as this chamber has too much freebore for this bullet to get anywhere near the lands. I went with the load data straight from my load manual at 3.100" COAL and used H4831sc as I have a good amount and it was towards the top end of the speed according to my manual as well. Chrono details below: 52.5gr - 3,195 fps 53.0gr - 3,194 fps 53.5gr - 3,227 fps 54.0gr - 3,280 fps 54.5gr - 3,313 fps 55.0gr - 3,388 fps 55.5gr - 3,404 fps I decided to load up 55.3gr at several different lengths to accuracy test. 3.0980" COAL - horizontal stringing, about 3/4" at 100 yards 3.0950" COAL - only fired 2 shots, were 1.5" apart - all horizontal 3.0920" COAL - 2 touching, 1 a 1/4" high - a 1/2" group but still wasn't driving tacks like I really wanted *I decided to use this as a backup load, in case I wouldn't have enough time to get another bullet dialed in before my New Mexico Antelope hunt. My BIL with the same reamer had a really good load with the 105gr Berger VLD's. So, I opted to try those out as well with H1000, again at .040 off lands. Below were those chrono results: 54.5gr - 3,077 fps 55.0gr - 3,135 fps 55.5gr - 3,167 fps 56.0gr - 3,182 fps 56.5gr - 3,232 fps 57.0gr - 3,246 fps (started flattening primers) 57.5gr - 3,297 fps (increased extraction pressure - flattened primer) I called the 57.5gr about max in this rifle, so backed off to the 55.5-56.0gr node and loaded up some to test at distance at .040 off. [/QUOTE]
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