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Rifles, Reloading, Optics, Equipment
Reloading
177 grn Hammer Bullets
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<blockquote data-quote="Shane Lindsey" data-source="post: 2819630" data-attributes="member: 25831"><p>I used N570 and Reloader 26 in a 7RM with the 177. 8 twist at sea level, on paper it looked good, targets were round holes, so I was comfortable with them at hunting altitude. Those are gone now, as is the rifle. If I was going to do it again, I would do the 169gr. You would lose nothing to the 177. But the 131s really flew...</p><p></p><p>Vihtavuori lists N170 and N570. The burn rate is slower, but their chart showed a little less energy witht the 20N29 vs the N170. I think you would be safe to start at with the same low end weight and load up to pressure.</p><p></p><p><strong>Energy content (J/g)</strong></p><p></p><table style='width: 100%'><tr><td><strong>N110</strong></td><td><strong>N120</strong></td><td><strong>N130</strong></td><td><strong>N133</strong></td><td><strong>N135</strong></td><td><strong>N140</strong></td><td><strong>N150</strong></td><td><strong>N160</strong></td><td><strong>N165</strong></td><td><strong>N170</strong></td><td><strong>24N41</strong></td><td><strong>20N29</strong></td></tr><tr><td><strong>3950</strong></td><td><strong>3700</strong></td><td><strong>3750</strong></td><td><strong>3600</strong></td><td><strong>3550</strong></td><td><strong>3700</strong></td><td><strong>3750</strong></td><td><strong>3650</strong></td><td><strong>3500</strong></td><td><strong>3700</strong></td><td><strong>3700</strong></td><td><strong>3600</strong></td></tr></table><p></p><p>This is for a 7 RUM, but case capcity is close to a 28 Nosler. </p><table style='width: 100%'><tr><td>7mm RUM</td><td>0.284</td><td>1.0666</td><td>2.85</td></tr></table> <table style='width: 100%'><tr><td>.28 Nosler</td><td>0.284</td><td>0.9635</td><td>2.59</td></tr></table><p></p><p></p><p><strong>7 RUM</strong></p><table style='width: 100%'><tr><td>175</td><td>Swift</td><td>A-Frame</td><td>3.602</td><td>N170</td><td>81.2</td><td>85.0</td><td>2887</td><td>2999</td></tr><tr><td>175</td><td>Swift</td><td>A-Frame</td><td>3.602</td><td>N570</td><td>81.9</td><td>89.8</td><td>2864</td><td>3133</td></tr></table></blockquote><p></p>
[QUOTE="Shane Lindsey, post: 2819630, member: 25831"] I used N570 and Reloader 26 in a 7RM with the 177. 8 twist at sea level, on paper it looked good, targets were round holes, so I was comfortable with them at hunting altitude. Those are gone now, as is the rifle. If I was going to do it again, I would do the 169gr. You would lose nothing to the 177. But the 131s really flew... Vihtavuori lists N170 and N570. The burn rate is slower, but their chart showed a little less energy witht the 20N29 vs the N170. I think you would be safe to start at with the same low end weight and load up to pressure. [B]Energy content (J/g)[/B] [TABLE] [TR] [TD][B]N110[/B][/TD] [TD][B]N120[/B][/TD] [TD][B]N130[/B][/TD] [TD][B]N133[/B][/TD] [TD][B]N135[/B][/TD] [TD][B]N140[/B][/TD] [TD][B]N150[/B][/TD] [TD][B]N160[/B][/TD] [TD][B]N165[/B][/TD] [TD][B]N170[/B][/TD] [TD][B]24N41[/B][/TD] [TD][B]20N29[/B][/TD] [/TR] [TR] [TD][B]3950[/B][/TD] [TD][B]3700[/B][/TD] [TD][B]3750[/B][/TD] [TD][B]3600[/B][/TD] [TD][B]3550[/B][/TD] [TD][B]3700[/B][/TD] [TD][B]3750[/B][/TD] [TD][B]3650[/B][/TD] [TD][B]3500[/B][/TD] [TD][B]3700[/B][/TD] [TD][B]3700[/B][/TD] [TD][B]3600[/B][/TD] [/TR] [/TABLE] This is for a 7 RUM, but case capcity is close to a 28 Nosler. [TABLE] [TR] [TD]7mm RUM[/TD] [TD]0.284[/TD] [TD]1.0666[/TD] [TD]2.85[/TD] [/TR] [/TABLE] [TABLE] [TR] [TD].28 Nosler[/TD] [TD]0.284[/TD] [TD]0.9635[/TD] [TD]2.59[/TD] [/TR] [/TABLE] [B]7 RUM[/B] [TABLE] [TR] [TD]175[/TD] [TD]Swift[/TD] [TD]A-Frame[/TD] [TD]3.602[/TD] [TD]N170[/TD] [TD]81.2[/TD] [TD]85.0[/TD] [TD]2887[/TD] [TD]2999[/TD] [/TR] [TR] [TD]175[/TD] [TD]Swift[/TD] [TD]A-Frame[/TD] [TD]3.602[/TD] [TD]N570[/TD] [TD]81.9[/TD] [TD]89.8[/TD] [TD]2864[/TD] [TD]3133[/TD] [/TR] [/TABLE] [/QUOTE]
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Reloading
177 grn Hammer Bullets
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