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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Is my twist rate OK for my 7mm??
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<blockquote data-quote="JC Hedj" data-source="post: 754177" data-attributes="member: 32927"><p>As advanced AGE forced me to quit hunting and go into long range target challenges the one consistent factor that I discovered was " Bullet Seating Depth "</p><p> </p><p>Each bullet has a different ballistic co-efficient that is ONLY PUBLISHED for the BARREL USED in the TEST....that means THAT barrel used in the TEST wasn't yours,,,those numbers are ONLY a GUIDE and not a FACT for you.</p><p> </p><p>What you must now do is start at least 5 different bullet seating depths for your barrel , bullet - charge weight , temp , and humidity...keep a written journal and then try to duplicate your loads to the same conditions of the day that produced the best groups for you, consistently. </p><p> </p><p>Next, now repeat those results between 300 and 400 yds to establish bullet stability. Now you've got your accurate load for your barrel. </p><p> </p><p>At 100 yds you're only chunking Rocks at a target...no accuracy at that range.</p></blockquote><p></p>
[QUOTE="JC Hedj, post: 754177, member: 32927"] As advanced AGE forced me to quit hunting and go into long range target challenges the one consistent factor that I discovered was " Bullet Seating Depth " Each bullet has a different ballistic co-efficient that is ONLY PUBLISHED for the BARREL USED in the TEST....that means THAT barrel used in the TEST wasn't yours,,,those numbers are ONLY a GUIDE and not a FACT for you. What you must now do is start at least 5 different bullet seating depths for your barrel , bullet - charge weight , temp , and humidity...keep a written journal and then try to duplicate your loads to the same conditions of the day that produced the best groups for you, consistently. Next, now repeat those results between 300 and 400 yds to establish bullet stability. Now you've got your accurate load for your barrel. At 100 yds you're only chunking Rocks at a target...no accuracy at that range. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Is my twist rate OK for my 7mm??
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