You're the second person (of two) supporting custom turrets that gave an example indicating you don't understand how temperature impacts ballistics.
You're the second person (of two) supporting custom turrets that gave an example indicating you don't understand how temperature impacts ballistics.
That's not true I just told you what the difference was. 30 degress is 3/4 of an inch at 700 yards. If you have a blistic calculator you can look it up and verify it.
I used the example you gave- 5 inches, and pointed out that is absolutely does matter.
You keep saying temperature as if that is the defining factor. This is the long range hunting section in a forum dedicated to western US hunting- temp is just one factor. I have sat on the exact same ridge elk hunting and in 24 hours had the density altitude (DA) change over 3,500ft- 3/4” is not what the difference is in different environments. Using a .550 G1 BC bullet at 3000’ish FPS MV, every 5k change in DA is right at 6 inches at 700 yards. That matters. In the exact same state two days apart I have killed animals at 8,700ft DA and 1,100ft DA past 600 yards. That change matters.
BDC turrets and reticles are by and large marketed to, and used by, people who do not want to learn to shoot and who believe that all they have to do is get a turret marked out to 2,3,4,5,6, and spin it to the number and shoot. I average 3-4 days a week all year long shooting in the mountains in novel environments, see dozens of people a year shoot in it as well, hunt with a dozen plus people a year, and have yet to see a single person shooting a BDC turret that could hit anything past 400’ish yards on demand. Can it be done? Of course. I have an example of someone that does so. However, as has been stated- by the time you can account for the variables to make a BDC work on demand at distance, you don’t need what the BDC offers.
As for your speed…. Nah. Using mils it is easy to have a quick “BDC” like system that is as quick as anything around.
I'm just saying for normal hunting condition I think a custom turret works just fine. My 7mm-08 has hit animals out well past 700 yards in the US in Winter and Impala in Africa in 80s temp in Africa. I can spin it to 500 and drop a Baboon out of a tree 100% of the time. Again, I showed the math, what's is the difference in inches at say 500 yards with a 30-40 degrees temp change and a 3k elevation increase on a 175 grn 7mm, it's about 1 inch, or so. You are stating they are missing because their calculations are off? Impossible actually, literally impossible. Human error for the average hunter is 5 inches at 500 yards. If their turret is bad to 500 then they put bad data in when having the turret made. Gunwerks, Branded Rock, Best of the West, many shotting schools all have excellent luck with a custom turrets. Also, how is inputting several variables into an app and then counting clicks, faster than just turning the turret? Again, you can still click to a given MIL or MOA calculation with a custom turret, obviously the clicks do not change. A dope chart is basically a custom turret on paper, same thing. I have no doubt you are excellent at what you do, but I have at least a 100 kills with the same custom turret, never missed once. I do not take it to extremes though usually 300-700 yards. I 100% agree the further out the more it matters, but again for normal hunting conditions if someone missed at 500 with their turret that had good info put in to make it they are going to miss with the same info from an app. The difference is not significant enough to cause the miss. 1K yards, 1,500 yards different story. There is also nothing to "learn" about dialing, it's just input a few variables and you are there. Yes real world data, velocity from the barrel, BC, etc all have to be correct, but they have to be correct on a custom turret as well. Lastly wind if a whole different story and of course is the same even if you have an app.
My very slippery 180 Berger hybrid out of my 7mm RM changes poi by about 3.5" going from a winter practice day (20F at my 5500' range) to a warm afternoon late spring bear hunt (75F at 8500') at 600 yards. Do I get my turret cut for practice? Or for hunting? Do I try to split the difference and cheat up during practice and hope I remember to cheat down on that bear hunt instead of up, but be right on for high country cool weather deer?
I don't understand voluntarily adding a couple inches of built in error to my shooting system. It doesn't even have to push you off the bottom of the plate to make you miss. Two inches below center on a 10" plate is a little over 8"wide, so you've decreased your allowance for wind error by 20%.
Often, higher and colder or lower and warmer go together, and cancel each other out to some extent. High elevation and warm temps are both factors that lower air density, so low and cold to high and warm is the most significant change.
My very slippery 180 Berger hybrid out of my 7mm RM changes poi by about 3.5" going from a winter practice day (20F at my 5500' range) to a warm afternoon late spring bear hunt (75F at 8500') at 600 yards. Do I get my turret cut for practice? Or for hunting? Do I try to split the difference and cheat up during practice and hope I remember to cheat down on that bear hunt instead of up, but be right on for high country cool weather deer?
I don't understand voluntarily adding a couple inches of built in error to my shooting system. It doesn't even have to push you off the bottom of the plate to make you miss. Two inches below center on a 10" plate is a little over 8"wide, so you've decreased your allowance for wind error by 20%.
Often, higher and colder or lower and warmer go together, and cancel each other out to some extent. High elevation and warm temps are both factors that lower air density, so low and cold to high and warm is the most significant change.
Hunting of course, or get 2 turrets made. Just dial while at the range, use the info for your average hunting conditions for a custom turret. I have several turrets for different bullets, that's a way bigger factor than the temp swings from the middle of course. BUT if you have one made at 45 degrees and 6k ft of elevation guess what? The difference is better than you can shoot the gun anyway at 600. The goal is to have a turret made that is the in the center, no one has a turret made for 10K elevation and -20, well maybe someone does if hunting 150k sheep in Mongolia, but not me. If you are going to hunt extreme differences from your turret, then dial to what you need. Again a custom turret does NOT change a thing, it's still clicks. A dope Card is a custom turret, but on paper instead of plastic. I have used the same turret all over the US, Europe, Africa, shoot well over 100 animals with the same turret, never once missed an animal under 750 yards that I was 100% steady on. I am not talking wind, that of course is the big factor. I would not take a 500 yard plus shot in heavy wind without some data. I would bet there are as many errors made using a Applied Ballistics inputting wrong data as a custom turret. Not to mention we can use 5 different apps, input the exact same info and literally get .5 to 1 moa difference in the information returned to us at extreme distances. Best info is real world data, regardless if it's etched on plastic or on a cell phone screen.