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Long Range Hunting & Shooting
Lazz 7.82 Warbird w/190gr Berger VLD
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<blockquote data-quote="Fiftydriver" data-source="post: 581492" data-attributes="member: 10"><p>Generally the Berger bullets that have issues with velocity are the smaller calibers in the heavy for caliber weights such as the 22 cals in heavy 80 to 90 gr weights and 6mm in 105 gr. and 6.5mm 140 gr VLD.</p><p> </p><p>These are generally most accurate in velocity ranges up to 3250 fps.</p><p> </p><p>THe larger Bergers such as the 7mm, as mentioned generally do very well up to around 3400 fps in a fresh barrel but in a worn barrel are sometimes limited to 3300 fps for accuracy.</p><p> </p><p>Also, rifling design is critical. You want less then 22% baring surface compression on the bullets by the rifling. Does not really matter what rifling design you have, if your much over 22% baring surface compression, you will likely have accuracy issues, if your barrel has less then this, you will have fine accuracy results most of the time.</p><p> </p><p>Most 3 groove barrels have pretty wide lands and generally have issues with Berger bulelts over 3250-3300 fps. Just something to keep in mind. </p><p> </p><p>Spinning these bullets excessively fast will also cause problems so make sure you have the right twist rate for your bullet weight and velocity range you are working at and less then 22% baring surface compression and you will likely have very few problems with the Berger bullets. </p><p> </p><p>They also shoot the best seated JUST off or lightly touching the lands. I prefer not to load hunting ammo to touch the lands so I seat then 5 to 10 thou off just for increased reliablility.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 581492, member: 10"] Generally the Berger bullets that have issues with velocity are the smaller calibers in the heavy for caliber weights such as the 22 cals in heavy 80 to 90 gr weights and 6mm in 105 gr. and 6.5mm 140 gr VLD. These are generally most accurate in velocity ranges up to 3250 fps. THe larger Bergers such as the 7mm, as mentioned generally do very well up to around 3400 fps in a fresh barrel but in a worn barrel are sometimes limited to 3300 fps for accuracy. Also, rifling design is critical. You want less then 22% baring surface compression on the bullets by the rifling. Does not really matter what rifling design you have, if your much over 22% baring surface compression, you will likely have accuracy issues, if your barrel has less then this, you will have fine accuracy results most of the time. Most 3 groove barrels have pretty wide lands and generally have issues with Berger bulelts over 3250-3300 fps. Just something to keep in mind. Spinning these bullets excessively fast will also cause problems so make sure you have the right twist rate for your bullet weight and velocity range you are working at and less then 22% baring surface compression and you will likely have very few problems with the Berger bullets. They also shoot the best seated JUST off or lightly touching the lands. I prefer not to load hunting ammo to touch the lands so I seat then 5 to 10 thou off just for increased reliablility. [/QUOTE]
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Lazz 7.82 Warbird w/190gr Berger VLD
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