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Joined: May 2015
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Campfire Regular
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Does that mean you're calculating your BC's using 150yard data and extrapolating beyond to build your drag curves and get your G7 and drop values? Or are you taking drop data and backing it into your computer to give you a BC?
Pretty much that is it.
Taking velocities at face value from the LR I've found that the BC's advertised do not always jive with the ballistic calculator. This assumes correct inputs for atmospheric conditions as best as possible (the Vortex calculator is good for that when you know your position).
Testing reveals that some bullets do not actually fall to the POA as predicted in the calculator (tall test verifies scope correction factor).
Ultimately I take the data garnered in the field and 'back' it into the program.
Many times using Litz's BC's things work out as come ups are as predicted.
I think what is skewing my results on occasion, are a combination of, velocity too slow, rate of twist not optimized and some rifles damaging the bullet a bit as it enters the rifling.
With the Labradar an up date to version 1.1.3 solved the 22 caliber issue.
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Joined: Jun 2004
Posts: 44,832
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,832 |
RCarmuglia,
It's interesting that your friend cited a SD of 8 for a 30 shot string. A long time ago, Bob Jensen who loaded the ammo for the 92 Palma matches cited a sigma 7 as the holy grail for 600 yard loads in my sport (Highpower Rifle). (I'd have to check what N was attached to that). What's interesting is he dumped powder for the 92 Palma Ammo. He shared that he got his sigma 7 through means other than granule accurate powder charging. I think he attributed testing primer lots by shooting primer powered bb's out of a special rig over a chrono to test their consistency and force (he said softer was better). Alan Warner feels otherwise on powder charges. He told me that kernel counting powder charges was the way to consistent elevations at 1K. I think he was trying to rationalize his purchase of his Prometheus. I have a Gen1 and it doesn't make me hold elevation like the Tompkins clan. I'm pretty sure one consideration was the need to produce a quarter million units. That's the figure I recall from the article in Handloader magazine.
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Joined: Jun 2010
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Campfire Tracker
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Campfire Tracker
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In some forum I read where Litz is now using the new Oehler system 88. From what I could gather the 88 can measure time of flight to within a millisecond at ranges over 1000 yards, uses GPS, radio and acoustic targets and is battery powered. Given the quality of Oehler stuff and the skill of Litz I expect we'll see even more accurate data in his next book.
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Joined: Feb 2008
Posts: 2,704
Campfire Regular
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Campfire Regular
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[bleep] A Aalf that is some very nice shooting brother and I don't compliment much.
It is indeed hard for me to wrap my small brain around how someone can't realize/understand/agree that a single grain of powder can, will and does make a difference in combustion energies produced.
If I was that anal or desired such beyond what I get on my gear you can bet your fart maker that I would have a scale that would do exactly such.
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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Joined: Apr 2010
Posts: 14,706
Campfire Outfitter
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Campfire Outfitter
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Even birds know not to land downwind!
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
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Has anyone considered...........ah, who am I kidding.
Carry on.
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Joined: Dec 2008
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Campfire Ranger
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Campfire Ranger
Joined: Dec 2008
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Haha makes me wonder how I've a garage/shop full of bone.... Puzzys...
They key word in hunting, is "hunt"...... But that's simply not cool. A "hunter" needs to shoot rimfires and everything else at dumb range, cause there's nothing else to do.... Poor dumbphuques.... Don't "wonder" when a wife strays, or a sibling eats a boolit.... Hint, re hint, re hint +++ P
Ping pong balls for the win. Once you've wrestled everything else in life is easy. Dan Gable I keep my circle small, I’d rather have 4 quarters than 100 pennies.
Ain’t easy havin pals.
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Joined: Dec 2008
Posts: 21,179
Campfire Ranger
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Campfire Ranger
Joined: Dec 2008
Posts: 21,179 |
Oooooops the magical word, "hunt".....
Mebee the do nothing crowd should say, long range "shooting"?????
Ping pong balls for the win. Once you've wrestled everything else in life is easy. Dan Gable I keep my circle small, I’d rather have 4 quarters than 100 pennies.
Ain’t easy havin pals.
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Joined: Apr 2010
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Campfire Outfitter
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Campfire Outfitter
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"There are lies, damned lies, and then Statistics!"
Winston Churchill
Even birds know not to land downwind!
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Joined: Dec 2008
Posts: 21,179
Campfire Ranger
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Campfire Ranger
Joined: Dec 2008
Posts: 21,179 |
There are those that do, and those that dream....
Ping pong balls for the win. Once you've wrestled everything else in life is easy. Dan Gable I keep my circle small, I’d rather have 4 quarters than 100 pennies.
Ain’t easy havin pals.
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Joined: Feb 2008
Posts: 2,704
Campfire Regular
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Campfire Regular
Joined: Feb 2008
Posts: 2,704 |
And then there are the west coast libs that live happily amongst the top ten gayest population whilst spouting judgement from their child chit filled holes, voted democrat the last seven elections and can't hit a can past 200.. Carry on
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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Joined: Jan 2010
Posts: 8,423
Campfire Outfitter
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Campfire Outfitter
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I vote R am a deplorable azz and shoot the chit out of cans so hold your tongue 9. We ain't all bad. http://youtu.be/Q8Ax9W2H54A. Ps 1000 yards
Last edited by fredIII; 09/13/16.
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Joined: Feb 2008
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Campfire Regular
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Campfire Regular
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And your drinking one of my favorites, you pass!! But I do prefer bottles in that flavor if your ever buying.
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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Joined: Jan 2010
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Campfire Outfitter
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Campfire Outfitter
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Noted if the opportunity ever arises bottles it is.
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Joined: Mar 2008
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Campfire Tracker
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Campfire Tracker
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Haha makes me wonder how I've a garage/shop full of bone.... Puzzys...
They key word in hunting, is "hunt"...... But that's simply not cool. A "hunter" needs to shoot rimfires and everything else at dumb range, cause there's nothing else to do.... Poor dumbphuques.... Don't "wonder" when a wife strays, or a sibling eats a boolit.... Hint, re hint, re hint +++ P Its the long range "hunting" forum, true. But its where we talk about precision LR shooting as well, like this thread. Only one talking about hunting is you, for some reason.
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Joined: Jun 2006
Posts: 46,038
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,038 |
I'd say if someone wants to be a long range hunter, he ought to do a lot of long range shooting first. Unless you're hunting beer cans like Fred. Fred, did you get an exit wound?
A wise man is frequently humbled.
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Joined: Jan 2010
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Campfire Outfitter
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Campfire Outfitter
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She was standing on the lid. Lol if it helps I shoot sticks, rocks, paint dots ect.
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Joined: Jun 2006
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
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That's impressive penetration, must've been a Barnes.
A wise man is frequently humbled.
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Campfire Outfitter
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That's impressive penetration, must've been a Barnes. I'm not seeing evidence of the "4 razor sharp petals cutting like a buzzsaw" thru that aluminum. Coors - the .270 of beers . . . I drank a few when I was at Mines.
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Campfire Regular
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Campfire Regular
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The 4 razor petals only show on PBR cans , thicker steel, I mean tin, I mean aluminum but anyway its thicker see.
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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