Do you manually input: Alt bar pressure humidity etc?
Pressure is absolute: what does this mean? Toggle On or off?
Coriolis, I know what it is. Do you enable ?
I pull my bullet data from library, cause its probably better than me.
For example, my AMAX 208g in 300wm were way off at 1400 yards. But I made 50% hits. What do you do for :
Velocity variation?
Powder temp , we accidentally cooked our ammo one day and wow, it shot amazingly hot.
Atmospheric STD , ICAO OR ASM, EXPLAIN IF YOU CAN ?
Drag model G1 or G7 , which do you use and what’s the difference?
ZERO ATMOSHERE: this is now under bullets edit
Enable ?
Pressure is absolute ? Enable or not?
I would be thrilled to make this happen correctly.
Markm bought some new steel , looking forward to dinging that up.
Guys I have zero formal training and am completely self taught. So this shit is all new. I just get out there and shoot and shoot and shoot, Markm’s laser beam rounds. But I need more self study.
Would a guy who is just learning this have a Kestrel? I assumed he would not. If he does, then of course he can enter the local values manually.
As for turning Coriolis off, why would you? Under 1000 it won’t matter, so why not just leave it on? And at 1400, it will have an effect, and so will spin drift (Pappabear, if you don’t have your twist info in the weapon profile, you need to put it in there. I have 0.3mrad of combined spin drift and Coriolis at 1000 yards. That’s 10.8 inches, and since I’m shooting at a 5" X-ring if I didn’t dial it in…well, you do the math.)
And the atmosphere standard - if you aren’t using the same one your BC was calculated with then you’re reading off two different maps.
Ok. You can teach him the wrong ways “until he learns.”
I’ll teach him the way I do it.
I “assume” that he and mark are intelligent guys, (and I assume correctly) and would realize the gravity of my statements and procure a kestrel if they don’t already have one. They are intelligent types that I’ve talked to quite a few times about various subjects over the last couple years.
You advocate downloaded atmospherics, barometric pressure instead of station pressure, then suggest using Coriolis!??!!? :blink:
I didn’t “advocate” anything, I simply did not assume that a beginner would have any additional equipment at all. But feel free to continue being a dick, since that seems to be where you want to be today.
The data you get out of the program is only as good as the data you put in. If you don’t have a Kestrel or some other way of ascertaining the actual environmental data for the area where you are then the data you get out of the program isn’t going to be very useful at any decent distance. My recommendation if you don’t have a weather station is to buy one. The price of a Kestrel isn’t insignificant but it’s part of the game, and if you’re putting thousands into a rifle and an optic and ammo and targets and all the other gear, you really should invest in a Kestrel.
note that when you get your kestrel, you will also have to set it up to use the correct pressure.
using local stations is better than nothing but you never know where those are or what the conditions are there. the stations are owned by volunteers… anyone who buys one and connects it to the internet. if some knucklehead puts his weather station right over his dryer vent or something… that’s just going to cause you frustration.
re: coriolis… doesn’t that depend on direction you are facing? wouldn’t a statement like
I have 0.3mrad of combined spin drift and Coriolis at 1000 yards.
be specific firing point and target, such that if you turned 90* and shot a different target, your coriolis would change? it implies your phone has a compass and is tracking it. i’d be impressed if you faced north and asked shooter for your solution and then faced east and got a different solution.
I was going to point that out, but I felt it to be of little consequence, as the guy I would be pointing it out to would just come back with some kind of retort.
Let’s drive the point home shall we?
Taliv, have you been successful in competitions, or for fun, where the targets are facing toward all points of the compass WITHOUT accounting for Coriolis? I bet you have.
I have been quite successful in those situations without EVER accounting for Coriolis.
Again, it comes down to academic conversations, compared to real world performance.
truth is i cant’ recall ever calculating it. i’m 13th in the standings at the moment. (a lot better than I deserve!..see link in my sig) but i haven’t seen any stages much past 1100 yards. lots of stages have targets 90*+ apart from each other though.
I’ve never used the Bullet Library, but I would assume that the program automatically changes the drag model based on which one the library data uses. At least it should. Might want to find out what the BC’s are for the various drag models with the rounds you’re using to make sure it’s matching the BC with the model. If it’s giving you G1’s for a BT bullet, I suggest getting the G7 data and just inputting it manually.
I use a litz G7 for all of my loads. Dead-nuts accurate BC’s. Balls-on accurate.
… as accurate-as-you-can-get-without-a-million-dollar-doppler kind of accurate.
I’m not team green, but you’ll notice green and blue are saying the same shit, which is different than team red. Team green is an actual sniper. Team blue is a dick apparently, and team red is still wrong.
Hey a0cake… this weekend I’m going shooting with a scout from SEAL team 7. Should be fun finally being able to shoot with someone I can learn something from. I’ll be switching my brain to “suck” mode and will be trying to siphon off anything useful. I’ll be sure to report if there is anything revolutionary revealed. (in PM obviously)
I aim to please JDM. I’m kinda like a vegas hooker in that regard. The experience might give you a rash, but it will be fun at the time.
a0cake, the bullet library has the correct G7 bc’s as well as bullet length and such in each bullet profile. If it says litz next to it, it’s right. Whether input manually or not, the numbers match up.
Go with the blue and green replies.
You could also go read my write-up here: http://www.caprc.com/forums/viewtopic.php?f=28&t=37
You will probably have to register on the forurm to read it, but it’s worth registering.
We run a much smaller california based precision rifle competition forum without all the noise of the hide…
Sounds like a good time. It’s always fun and educational shooting with dudes from other arenas with different backgrounds. Diversity in training sources and partners is the best way to get over performance plateau’s IMO.
