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Rifles, Reloading, Optics, Equipment
Reloading
7mm rem mag load data
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<blockquote data-quote="idaho elk hunter" data-source="post: 985709" data-attributes="member: 68226"><p>The node for a Barnes bullet in the 7mm REM Mag is ALWAYS going to be .070 to .050. Start with the 070 if you want to save time and components. If you have the capability have it freebored. This is the one bullet that accuracy will INCREASE when freebored.</p><p> </p><p>Three powders work the best. 4350's with 210 non magnum primers for ultimate accuracy and good energy. 4831's with the 215 mag primer very good accuracy and better energy. H1000 for the most energy and good accuracy with the Winchester Mag primer.</p><p> </p><p>These are all temp stable and produce the best internal ballistics and muzzle pressures with this bullet with a 24 to 26 inch barrel. The harmonics will be spot on. </p><p> </p><p>Do not use the load books to find your powder charge. The 7mm Rem mag is grossly under loaded do to its many configurations over the years. Start mid pack and work you way up until good pressure signs. Then back off 2 grains. This bullet likes to be pushed. Do not be unsafe and try to push to much. The hotter the load the tighter the group in most all cases with this bullet and powder combo.</p><p> </p><p> </p><p>With a decent factory barrel with a 9.25 twist or better you can shoot in the .4 range all day. 9.5 will work but will fall off accuracy at the 875 yd mark give or take.</p><p> </p><p>Barnes use to in the pre lawyer days, validated this.</p><p> </p><p>I is all about the internal ballistics. this way gives internal ballistic as good as the ppc cals.</p></blockquote><p></p>
[QUOTE="idaho elk hunter, post: 985709, member: 68226"] The node for a Barnes bullet in the 7mm REM Mag is ALWAYS going to be .070 to .050. Start with the 070 if you want to save time and components. If you have the capability have it freebored. This is the one bullet that accuracy will INCREASE when freebored. Three powders work the best. 4350's with 210 non magnum primers for ultimate accuracy and good energy. 4831's with the 215 mag primer very good accuracy and better energy. H1000 for the most energy and good accuracy with the Winchester Mag primer. These are all temp stable and produce the best internal ballistics and muzzle pressures with this bullet with a 24 to 26 inch barrel. The harmonics will be spot on. Do not use the load books to find your powder charge. The 7mm Rem mag is grossly under loaded do to its many configurations over the years. Start mid pack and work you way up until good pressure signs. Then back off 2 grains. This bullet likes to be pushed. Do not be unsafe and try to push to much. The hotter the load the tighter the group in most all cases with this bullet and powder combo. With a decent factory barrel with a 9.25 twist or better you can shoot in the .4 range all day. 9.5 will work but will fall off accuracy at the 875 yd mark give or take. Barnes use to in the pre lawyer days, validated this. I is all about the internal ballistics. this way gives internal ballistic as good as the ppc cals. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm rem mag load data
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