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How long is long enough ?
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<blockquote data-quote="HARPERC" data-source="post: 1843754" data-attributes="member: 30671"><p>"Better results", and "works better" is a bit nebulous, but yes playing with the ballistics calculator will show some small fast bullets, outrun bigger BC numbers to a certain distance. If that works in your situation use it. I run 180 grain Accubonds in my .338 RUM at 3550 fps. A great mid range varmint load. A 100 yard antelope bullet-not so much. The splat factor is just to high.</p><p></p><p>We've been playing with a 6.5 Ultracat (6 twist), basically an improved RUM case. In previous use the powders weren't available to make it sing like it can today.</p><p></p><p>It's early to tell where the 6 twist fits, but ruling out a 5 twist without looking into it isn't something I'd do. Some interested shooter may come along with the right combination of cartridge, and bullet to bring it together.</p><p></p><p>My .375 was supposed to be a 1-10" twist, turns out it's like 1-11". Since then I've seen variations in twist aren't all that unusual when we start measuring them, and it may be prudent to lean a bit to the high side when ordering.</p></blockquote><p></p>
[QUOTE="HARPERC, post: 1843754, member: 30671"] "Better results", and "works better" is a bit nebulous, but yes playing with the ballistics calculator will show some small fast bullets, outrun bigger BC numbers to a certain distance. If that works in your situation use it. I run 180 grain Accubonds in my .338 RUM at 3550 fps. A great mid range varmint load. A 100 yard antelope bullet-not so much. The splat factor is just to high. We've been playing with a 6.5 Ultracat (6 twist), basically an improved RUM case. In previous use the powders weren't available to make it sing like it can today. It's early to tell where the 6 twist fits, but ruling out a 5 twist without looking into it isn't something I'd do. Some interested shooter may come along with the right combination of cartridge, and bullet to bring it together. My .375 was supposed to be a 1-10" twist, turns out it's like 1-11". Since then I've seen variations in twist aren't all that unusual when we start measuring them, and it may be prudent to lean a bit to the high side when ordering. [/QUOTE]
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