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Long Range Hunting & Shooting
Best Spin Drift online calculator?
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<blockquote data-quote="User4302021" data-source="post: 1772150" data-attributes="member: 105322"><p>Well, all I can say is this...</p><p></p><p>When I run something like a 300 Winmag in AB, at 1500 yards it gives me 0.4 mils spindrift with a 1/10 twist...If I run the same simulation with a 1/8 twist, it only gives me 0.5 mils.</p><p></p><p>Does that seem reasonable to you? To go from a very conventional 32 calibers per turn, to a fairly radical 25 calibers per turn, and only get a 0.1 mil difference at 1500 yards?</p><p></p><p>I might be wrong, but I don't think so. Not based on what I've seen. </p><p></p><p>Another experiment with AB...run a cartridge that is a known combination. Label it what it is 6.5 Creed, 300 Win,...whatever. Then record data with two different barrel twists.</p><p></p><p>Then, load the exact same profile for another rifle, but call it "Random" and run the same simulation. I bet you get a different solution.</p><p></p><p>I'm not bashing AB or any other program. I have them, I use them, I'm grateful for them. But all is not as it seems.</p></blockquote><p></p>
[QUOTE="User4302021, post: 1772150, member: 105322"] Well, all I can say is this... When I run something like a 300 Winmag in AB, at 1500 yards it gives me 0.4 mils spindrift with a 1/10 twist...If I run the same simulation with a 1/8 twist, it only gives me 0.5 mils. Does that seem reasonable to you? To go from a very conventional 32 calibers per turn, to a fairly radical 25 calibers per turn, and only get a 0.1 mil difference at 1500 yards? I might be wrong, but I don't think so. Not based on what I've seen. Another experiment with AB...run a cartridge that is a known combination. Label it what it is 6.5 Creed, 300 Win,...whatever. Then record data with two different barrel twists. Then, load the exact same profile for another rifle, but call it "Random" and run the same simulation. I bet you get a different solution. I'm not bashing AB or any other program. I have them, I use them, I'm grateful for them. But all is not as it seems. [/QUOTE]
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Best Spin Drift online calculator?
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