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Long Range Hunting & Shooting
Load Development 7mm Rem Mag Berger 195 Extreme Outer Limits (EOL)
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<blockquote data-quote="jdmecomber" data-source="post: 1349017" data-attributes="member: 94549"><p>This development has been pretty tough. I wonder if a 7 Rem Mag isn't supposed to shoot a 195 at 2880+ <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> I would assume that it's like shooting a 6mm 115 vld in a factory .243. It's probably not the best choice, but it might work with some adjustments.</p><p></p><p>I just finished the powder and lands testing. </p><p>I am using some Winchester brass that is brand new, and man was it beat up. I fire-formed some cases while doing the powder testing. </p><p></p><p>I am shooting prone off some bean bags and using an atlas bipod. There was a little bit of wind today... Enough excuses? </p><p></p><p><strong>Powder Testing Retumbo</strong></p><p></p><p>These 4 shot groups all had 3 close and one flyer opening the group around an moa.</p><p></p><p><strong>Round 1</strong></p><p>68.1 (3 shot) .462 MOA</p><p>68.4 (3 shot) .186 MOA</p><p>68.7 (3 shot) .336 MOA</p><p></p><p><strong>Final Test</strong></p><p>I tried 68.4 and 68.6</p><p>The bullet seems to be pretty erratic, however, the final powder charge was 68.4 grains and will do.</p><p>68.4 (3 shot) .234 MOA (4 shot) .553 MOA</p><p></p><p><strong>Lands Testing</strong></p><p>68.4 grains of powder</p><p>I used .010, .040, .060 and .080 jump into the lands. I didn't want to go .120 because the bullet was wayyyyy into the case. </p><p></p><p><strong>First Lands Test</strong></p><p>The winner surprisingly was .080 jump with 4 shots at .45 MOA. The great part is they fit in my factory magazine with ease. </p><p></p><p><strong>Final Lands Test</strong></p><p>I used .070, .080, and .088. It's pretty shocking that a small movement in depth would open up a group.</p><p></p><p>.070 (3 shot) .251 MOA (4 shot) .579 MOA</p><p>.080 (4 shot) .371 MOA</p><p></p><p>At this point, I had mixed feeling about trying to do this with a factory gun and a bullet that's truly designed for the larger 7mm family (in my opinion). </p><p></p><p><strong>Final Group Size and Adjusted Zero</strong></p><p>68.4 grains at .080 jump (3 shots) .30 moa (5 shots) .68 moa</p><p></p><p>To finish off the development for today, I adjusted the scope to zero the rifle. That black square is .50 inches</p><p></p><p><strong>Adjusted to Zero</strong></p><p>4 shot .46 MOA </p><p></p><p>My final thoughts are that this bullet is probably not being optimized for this factory gun. The 180 VLD or 175 EOL would probably be a better choice and would not be so hard to tune with this weapon. However, I am pretty happy with my adjusted zero group and location, and I am ready to shoot some deer (and maybe a bear) this fall. </p><p></p><p>Tomorrow I will get the hot and cold temperatures for the powder and the final velocity. I think it's going to be around 2875 FPS.</p></blockquote><p></p>
[QUOTE="jdmecomber, post: 1349017, member: 94549"] This development has been pretty tough. I wonder if a 7 Rem Mag isn't supposed to shoot a 195 at 2880+ :) I would assume that it's like shooting a 6mm 115 vld in a factory .243. It's probably not the best choice, but it might work with some adjustments. I just finished the powder and lands testing. I am using some Winchester brass that is brand new, and man was it beat up. I fire-formed some cases while doing the powder testing. I am shooting prone off some bean bags and using an atlas bipod. There was a little bit of wind today... Enough excuses? [B]Powder Testing Retumbo[/B] These 4 shot groups all had 3 close and one flyer opening the group around an moa. [B]Round 1[/B] 68.1 (3 shot) .462 MOA 68.4 (3 shot) .186 MOA 68.7 (3 shot) .336 MOA [B]Final Test[/B] I tried 68.4 and 68.6 The bullet seems to be pretty erratic, however, the final powder charge was 68.4 grains and will do. 68.4 (3 shot) .234 MOA (4 shot) .553 MOA [B]Lands Testing[/B] 68.4 grains of powder I used .010, .040, .060 and .080 jump into the lands. I didn't want to go .120 because the bullet was wayyyyy into the case. [B]First Lands Test[/B] The winner surprisingly was .080 jump with 4 shots at .45 MOA. The great part is they fit in my factory magazine with ease. [B]Final Lands Test[/B] I used .070, .080, and .088. It's pretty shocking that a small movement in depth would open up a group. .070 (3 shot) .251 MOA (4 shot) .579 MOA .080 (4 shot) .371 MOA At this point, I had mixed feeling about trying to do this with a factory gun and a bullet that's truly designed for the larger 7mm family (in my opinion). [B]Final Group Size and Adjusted Zero[/B] 68.4 grains at .080 jump (3 shots) .30 moa (5 shots) .68 moa To finish off the development for today, I adjusted the scope to zero the rifle. That black square is .50 inches [B]Adjusted to Zero[/B] 4 shot .46 MOA My final thoughts are that this bullet is probably not being optimized for this factory gun. The 180 VLD or 175 EOL would probably be a better choice and would not be so hard to tune with this weapon. However, I am pretty happy with my adjusted zero group and location, and I am ready to shoot some deer (and maybe a bear) this fall. Tomorrow I will get the hot and cold temperatures for the powder and the final velocity. I think it's going to be around 2875 FPS. [/QUOTE]
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Load Development 7mm Rem Mag Berger 195 Extreme Outer Limits (EOL)
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