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Rifles, Reloading, Optics, Equipment
Reloading
7mm mag 180gr Berger VLD & 308 w/ 168gr VLD HELP!
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<blockquote data-quote="Kiwi Nate" data-source="post: 321088" data-attributes="member: 8533"><p>Hi, please try to forget all the load from a disc type rubbish which was quoted to you. Your twist rate will be fine but you will need to experiment with velocity as this will have a pronounced effect on bullet stability. In your case, the faster you drive the 168gr VLD, the better. </p><p></p><p>H1000 is s good powder for the 7mag but it needs a long throated gun and long barrel to do the business. Max charges will be somewhere around 74-76 grains, definitely not 65 grains!. Use a chrony and test loads up to the 3000fps mark while closely watching for pressure signs. </p><p></p><p>H4831 is the most versatile powder in a short throated factory 7mm Rem mag. Again, work towards 3000fps-3030fps as a goal velocity in a 24" tube.</p><p></p><p>Be careful not confuse poor bedding with high velocity pressure signs. Many guys new to reloading (I am talking about my clients) will for example, have groups open up dramatically as velocity is increased- then think the rifle is over loaded. In unbedded rifles, the groups often open up to 3MOA+ way before max velocity. </p><p></p><p>In the .308, use a reloading manual and work up .5gr per test group as normal. Again, very important to use a chrony and have an understanding of pressure signs on the case. In a short barrel tactical rifle, use fast burning power, in a long barrel (24-26"), use Varget. </p><p></p><p>Hope that helps a bit.</p></blockquote><p></p>
[QUOTE="Kiwi Nate, post: 321088, member: 8533"] Hi, please try to forget all the load from a disc type rubbish which was quoted to you. Your twist rate will be fine but you will need to experiment with velocity as this will have a pronounced effect on bullet stability. In your case, the faster you drive the 168gr VLD, the better. H1000 is s good powder for the 7mag but it needs a long throated gun and long barrel to do the business. Max charges will be somewhere around 74-76 grains, definitely not 65 grains!. Use a chrony and test loads up to the 3000fps mark while closely watching for pressure signs. H4831 is the most versatile powder in a short throated factory 7mm Rem mag. Again, work towards 3000fps-3030fps as a goal velocity in a 24" tube. Be careful not confuse poor bedding with high velocity pressure signs. Many guys new to reloading (I am talking about my clients) will for example, have groups open up dramatically as velocity is increased- then think the rifle is over loaded. In unbedded rifles, the groups often open up to 3MOA+ way before max velocity. In the .308, use a reloading manual and work up .5gr per test group as normal. Again, very important to use a chrony and have an understanding of pressure signs on the case. In a short barrel tactical rifle, use fast burning power, in a long barrel (24-26"), use Varget. Hope that helps a bit. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm mag 180gr Berger VLD & 308 w/ 168gr VLD HELP!
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