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Rifles, Reloading, Optics, Equipment
Specialty Handgun Hunting
Long Range Pistol Project "30 BTAC"
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<blockquote data-quote="Black Diamond 408" data-source="post: 283137" data-attributes="member: 1563"><p>A while back i disected several of the magnum cases to see what the web thickness was. This is when i was having some issues with the 408 brass and the 338 wildcats. As you know the cases only take so much before the pockets go. I was testing cases for cheytac to see what could be done to strengthen the case. There is a big difference between a RUM case, Lapua and a Cheytac. The lapua had more web than the RUM, the Cheytac had more than the Lapua.</p><p> I talked with a engineer from Winchester Brass, he said that the longer you make the case the</p><p>more pressure will build up. He said the WSM case has less pressure on the base vs a 300 win mag case. The larger the base the less pressure will develope, as long as you have the same</p><p>powder capacity. The Lapua is a shorter case and much less capacity vs a 408-338 case. If you had a Lapua case the same length as a 408 case the pressure would be extremely higher and the case is more narrrow, more web area pressure. Most of my findings are based on what the</p><p>guy from Winchester explained to me.</p><p> I was in the small BR game years ago and the short fat cases were winning all the matches, magnum calibers may not react the same way for accuracy, testing will only tell. Heavy recoiling guns are not as accurate as a 6mm PPC, but a 6ppc will not get to 2000yds. I fired many groups with my PPC that were almost imposible to measure, 5 shots looked like one bullet hole. .006 was my smallest. But that is a whole different ball game.</p></blockquote><p></p>
[QUOTE="Black Diamond 408, post: 283137, member: 1563"] A while back i disected several of the magnum cases to see what the web thickness was. This is when i was having some issues with the 408 brass and the 338 wildcats. As you know the cases only take so much before the pockets go. I was testing cases for cheytac to see what could be done to strengthen the case. There is a big difference between a RUM case, Lapua and a Cheytac. The lapua had more web than the RUM, the Cheytac had more than the Lapua. I talked with a engineer from Winchester Brass, he said that the longer you make the case the more pressure will build up. He said the WSM case has less pressure on the base vs a 300 win mag case. The larger the base the less pressure will develope, as long as you have the same powder capacity. The Lapua is a shorter case and much less capacity vs a 408-338 case. If you had a Lapua case the same length as a 408 case the pressure would be extremely higher and the case is more narrrow, more web area pressure. Most of my findings are based on what the guy from Winchester explained to me. I was in the small BR game years ago and the short fat cases were winning all the matches, magnum calibers may not react the same way for accuracy, testing will only tell. Heavy recoiling guns are not as accurate as a 6mm PPC, but a 6ppc will not get to 2000yds. I fired many groups with my PPC that were almost imposible to measure, 5 shots looked like one bullet hole. .006 was my smallest. But that is a whole different ball game. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Specialty Handgun Hunting
Long Range Pistol Project "30 BTAC"
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