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  1. T

    Back from the dead

    Re: Back from the dead Hey guys, Thanks for the words, haven't met most of you, but it's good to read these words... DD, roger that, heading to the west with a couple of horses to play in the pass, will drop by, let me know if you're back in town sat or sun. Stay safe, keep your head below...
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    Back from the dead

    Hi guys, Been a long and crazy year, but great in alot of ways. If my ex-wife reads this, piss on you, you unbalanced disturbed, triple personality, manipulating, do-eyed, childish wench. There, I feel better now Down to business... who do I owe data tables to. Send me a note, and i'll...
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    Fieldcraft Lethality of the 22LR- Results!

    Re: Lethality of the 22LR- Results! Some turd out here in idaho is shooting cows and horses along the bingham and bonneville county lines with a .22 and killing them, albiet slowly... I'd surely like for the turds to wander in front of some rather advanced technology!! Later
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    Projectiles & New Systems

    Re: Projectiles & New Systems Huckleberry, Generally speaking subsonic flight is done with flatbased bullets. Did alot of experimenting in the 80s and 90s developing subsonic out of the barrel shots for 7.62 and 300 win mag, flatbase works the best across the board. The boat tail design...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Montana,,, you nailed it. It's that simple. IsleofGough... never shot a bullet backwards down the bore? Doesn't hurt a thing, as long as the crowns in good shape, accuracy is pretty good, DAMN hard on wild boar, a 220 gr. SMK out of a 300 mag going...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Sorry, more... 408 Cheytac: 1.9" 375 / 408 Cheytac: 0.87" 5.56mm M193 Ball: 23.0" alot huh? 338 Lapua / 300 gr. SMK: 6.5" So, no there is no standard MOA at a certain range. Many factors come into play. As for controlled spin bullets, here's the list: 50...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Lowlight, Good questions, but first, the 1 MOA at 1000 yards issue. That is ONLY for 168, 173 SB, 173 SMK, 185 Lapua FMJBT and Scenar and other NON controlled spin bullets. You see, the controlled spin of the LRBT bullets, when it' working corrects about 87% on...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Jeff, I agree with your note on multiple winds. Gotta address them, I just look at this whole SD and Coriolis thing as this. If there is anything that I CAN analyze and eliminate mathematically, I would rather NOT assume something is missing in the wind. There...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? hhmmmm... how to word some of this politely. Some shooters here are NOT shooting long range when coming up with their thoughts on spin drift. Here are some handrails to apply to the thinking. 1. SD exists practically at all ranges, it MUST be accounted for and...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Wind deflection, elevation take off angles, are also mathematical formulas,,, and all are affected by air temp, and BP changes. Wind corrections are temp driven, granted not a 308 ranges, unless you're within 10% of transonic range, then yes, those values are...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Come on we haven't even got into the effects of low air pressure (high altitude) and air temp changes in relation to SD. And it ain't what you might think... sorry, couldn't help it > All in all, it's good discussion. Wilshire... your drift in relation to...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? dang.... boot to the head, boot to the head, crotch kick... What a way to wake up, what were we yakkin about?
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Tell you what, tomorrow i'll post the formula in it's entirety, won't do much good though, other values are needed that are taken from coordinate data. Don't mean to stir the pot, every data table i generate (which isn't many lately) has SD calculated for...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Fer crying out loud guys, THE FORMULA IS THERE. What you probably can't find is some of the specifics like "K" Factor, and S (v) and S (V) and some other keys. SD is not a simple multiple entry formula, known data is required. Mike, we DID do doppler shots on...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Scroll down to secondary data to see the spin drift data for a LRBT 250 gr. 338 bullet.
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Huckleberry</div><div class="ubbcode-body">CKA, that is a real good question. SD seems to increase with range. More than the initial correction. Why I don't know. </div></div> Spin Drift...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Admitted, i'm anal retentive on precision... 1500+ meters for 95% of my last 12 shooting years has beaten into my head, DON'T IGNORE NOTHING.... kind of like the Rangers 1st rule, Don't Forget Nuthin... 5 Degrees of air temp change in all but the highest...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Allow me to explain the reason for addressing spin drift another way... You have 7 components of horizontal possible error: 1. Wind drift. 2. Spin Drift 3. Coriolis 4. Air temp effects on 1 and 2 5. BP effects on 1 and 2 6. Projectile stability error on all...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: thunder11</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">SOTIC has taught this since the 80s and it is simply a...
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    Range Report Spindrift Calculation??

    Re: Spindrift Calculation?? Two Shoes,,, thanks for the kind words. Here's one for the spin drift theory... If spin drift doesn't exist in relation to bullets in flight... airplanes wouldn't get off of the ground Glad they do. Trigger
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