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Joined: Sep 2010
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Campfire 'Bwana
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Campfire 'Bwana
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"I can't be canceled, because, I don't give a fuuck!"
--- Kid Rock 2022
Holocaust Deniers, the ultimate perverted dipchits: Bristoe, TheRealHawkeye, stophel, Ghostinthemachine, anyone else?
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Joined: Oct 2008
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Campfire Regular
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Campfire Regular
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Thank you, that is a better link than I've seen before. This portion (describing the definition of D-A as well as how to calculate it) bears further study: Using the numerical values of the ISA constants, that expression may be evaluated as: ![[Linked Image]](http://wahiduddin.net/calc/images/density/wpe27e.gif) where H = geopotential altitude, km D = air density, kg/m3 Now that H is known as a function of D, it is easy to solve for the Density Altitude of any specified air density. It is interesting to note that equations 9, 10 and 11 could also be evaluated to find H as a function of P as follows: ![[Linked Image]](http://wahiduddin.net/calc/images/density/densit19e.gif) where H = geopotential altitude, km P = actual air pressure, Pascals
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Joined: Sep 2010
Posts: 31,402
Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2010
Posts: 31,402 |
For sure. This part is especially helpful with uber long shots!.  ![[Linked Image]](https://s6.postimg.org/68ew0qmi9/densit21e.gif)
"I can't be canceled, because, I don't give a fuuck!"
--- Kid Rock 2022
Holocaust Deniers, the ultimate perverted dipchits: Bristoe, TheRealHawkeye, stophel, Ghostinthemachine, anyone else?
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Joined: Nov 2003
Posts: 18,300
Campfire Ranger
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Campfire Ranger
Joined: Nov 2003
Posts: 18,300 |
Thank you for the time and effort that you put into this post, it is probably one of the best and most informative posts I have seen on the optics forum. I saw someone posted something childish as many often do however history never built a statue for a critic. Very good post!
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Joined: Dec 2003
Posts: 17,230
Campfire Ranger
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Campfire Ranger
Joined: Dec 2003
Posts: 17,230 |
For sure. This part is especially helpful with uber long shots!. pv=nRT baby!
...Actually Sycamore, you are sort of right....
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Joined: Feb 2004
Posts: 7,731
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2004
Posts: 7,731 |
Awesome thread thanks so much.
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Joined: Jan 2005
Posts: 22,884
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 22,884 |
As much as I'd maybe like to, I can't get MIL going and I'm stuck on MOA. Me too....and one of the primary reasons is I'd have too much crap to switch over. Are you guys still thinking in terms of inches of correction to make? Nope. I just have a bunch of stuff memorized and I'd also have to switch a bunch of scopes. Example -- I have three 223's that I shoot (2 bolts, one AR). I know this one's up 24 (MOA) at 800, that one is up 10 at 500, one is up 6 at 400, etc. Each has a chart too, but they're almost useless at this point. About the only time I use the chart is for wind. Throw 5-6 more rifles into the mix and that's a bunch of scope purging and a ton of time (money too!). I typically choose one bullet for each rifle and stick with it. If I added a different cartridge to the line up and scoped it with a mil set up, it probably wouldn't bother me. I'm just using numbers anyway - not inches. If you are "just using numbers" for your come-ups, then you wouldn't have any trouble switching to a mil scope. The large advantage you would gain is if your reticle is in mils along with your turrets. Then you can cross-reference the two precisely.
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Joined: Jun 2007
Posts: 7,900
Campfire Outfitter
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Campfire Outfitter
Joined: Jun 2007
Posts: 7,900 |
Milliradian, minute of angle. Both units of angular dimension. Same-same.
Use the convention you are familiar with.
Thanks for the post Form.
GOA
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Joined: Oct 2008
Posts: 8,748
Campfire Outfitter
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Campfire Outfitter
Joined: Oct 2008
Posts: 8,748 |
Milliradian, minute of angle. Both units of angular dimension. Same-same.
Use the convention you are familiar with.
Thanks for the post Form. Yes. But do so with a reticle that has marks that relate directly to clicks. Being able to measure with the reticle and quickly know exactly how many clicks to adjust is a beautiful thing. No guesswork involved.
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Joined: Jan 2001
Posts: 58,244
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2001
Posts: 58,244 |
All of this stuff is Vudoo. Laughing! ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/922/4S5aXn.jpg) ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/922/2hpFzT.jpg) ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/922/Sq8fdE.jpg) Google it. Hint. Just more Safe Queen Fluff. Laughing! ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/922/x3Jwhn.jpg) ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/923/xdi4NJ.jpg) 30 MOA rail and 40 MOA Horn's coughed up 39.1 Mils on a 6x MQ erector,on the far side of it's 50yd zero. Weather ain't been any too nice and haven't shot it much past the 600yd line...as I'm awaiting 700yd weather. Don't "forget",that EVERYTHING below fhuqking zero,is 100% fhuqking USELESS. 39.1 Mils of vudoo Splendor RINKHave a smidge of ammo for it,in a Lot of repute. ![[Linked Image]](http://imagizer.imageshack.us/v2/1280x1024q90/922/nJBuku.jpg) Only 17.8 Mils to the 400 in the day's atmospherics and luckily there was NO wind,current,corriolis or spin drift to contend. Laughing! I swear it's ALL Vudoo RINK one I swear it's ALL Vudoo RINK twoThough admittedly,I've seen a FFP Milscale Spotter be "handy". Never been tough to cypher,who shoots and who don't. Hint. The Bart' spout thinks it's a fhuqking Annie to boot........................(grin)
Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
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Joined: Mar 2002
Posts: 9,129
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2002
Posts: 9,129 |
Like clock work...........
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Joined: Sep 2010
Posts: 31,402
Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2010
Posts: 31,402 |
Like clock work........... Yup...
"I can't be canceled, because, I don't give a fuuck!"
--- Kid Rock 2022
Holocaust Deniers, the ultimate perverted dipchits: Bristoe, TheRealHawkeye, stophel, Ghostinthemachine, anyone else?
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Joined: Aug 2009
Posts: 20,824
Campfire Ranger
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Campfire Ranger
Joined: Aug 2009
Posts: 20,824 |
Well stick was his usual helpful self. Did you notice all the cool stuff still in packages? Wow And we should all be impressed cuz we would have to take out a loan for the scope caps! woohoo 
Originally Posted by Judman
PS, if you think Trump is “good” you’re way stupider than I thought! Haha
Sorry, trump is a no tax payin pile of shiit.
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Joined: Mar 2002
Posts: 9,129
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2002
Posts: 9,129 |
Well stick was his usual helpful self. Did you notice all the cool stuff still in packages? Wow And we should all be impressed cuz we would have to take out a loan for the scope caps! woohoo Pretty sure these are multi person orders, than takes a few pics before dispersing the product.......
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Joined: Apr 2013
Posts: 3,158
Campfire Tracker
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Campfire Tracker
Joined: Apr 2013
Posts: 3,158 |
I thought the same thing. Now we need the third to complete the circle jerk....so funny and oh soooo predictable. Oops. Didn't realize the third had surfaced....this will continue to be a great and ent training read.
Last edited by d500lnn; 12/18/17.
Regards,
Nick- Georgia
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Joined: Aug 2017
Posts: 148
Campfire Member
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Campfire Member
Joined: Aug 2017
Posts: 148 |
Does anyone know if the SWFA scopes are military surplus ?..If so that would xplain why they are well made...Thanks for any info
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Joined: Jun 2006
Posts: 45,979
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 45,979 |
They're not military surplus.
A wise man is frequently humbled.
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Campfire Tracker
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Campfire Tracker
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Campfire Regular
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Form, thanks for an excellent post. Your willingness to share reflects the best of this forum!
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Joined: Oct 2004
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Campfire Ranger
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Campfire Ranger
Joined: Oct 2004
Posts: 26,421 |
These Form tutorials are incredibly useful. I wish we could create a sticky where he can deposit all of them.
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