Discussion in 'Rifle Country' started by Jonny2guns, Jun 12, 2022.
And it doesn't matter if you're shooting uphill, or downhill. The actual horizontal distance the bullet travels is somewhat less due to the angle. This is only an issue when shooting at much longer distances, and with much steeper angles. It's actually more of a problem for archery hunters shooting from an elevated stand. If you're 30' up a tree and shooting at a deer 30' away the deer is actually only about 20' from the base of the tree. With the arched trajectory of an arrow that is significant.
I always get the shooting part of this confused, but I seem to remember if your gun is zeroed on a level plane, you need to start aiming low, past a certain degree, and that goes either way, positive or negative, due to the trajectory curve.
Im not sure if the answer is here or not, but I use JBM's trajectory calculator for a lot of stuff and its pretty extensive. The answer you seek is probably in there somewhere, if you get to digging.
With my dad 6.5 12° slope equates to 0.1 of an inch difference.
SIG KILO 2200MR.... is that new enough?
That would depend on the powder used. Some powder will change velocity 2-3 fps for each 1 degree temps change. A rifle tested at 70 degrees could be 140-200 fps slower at 0 degrees. That might make a difference at longer ranges. But most powders anymore are pretty temperature stable and will see 1/2 fps or less change. With that type of powder no more than 35 fps difference with 70 degrees temperature change.
Strelok can use your phones accelerometer to give you the slope also.
Ive compared it to my RF a few times and they agree perfectly......
It's also assumes your phone's accelerometer is calibrated properly i suppose..... You don't get asked you to do that anymore, but in a lot of the older apps that used it for stuff like this they did.
Your 2200MR can display angle compensated range as well as LOS range. Not really an age thing, some LRF’s have had angle compensation calculators and onboard inclinometers for at least 20yrs.
Thats what I was getting at; if you’ve already been given the compensated range it should be on. If you have the actual range, you’ll be off because of the angle. Just reminding people to know which distance they’re actually shooting at.
the bullet is actually traveling 100 yards. what you're thinking is a simplistic way to calculate trajectory for angles is to consider the effect of gravity only over the horizontal portion, which is why the cosign angle doohickies you attach to scopes used to be popular. but unless your projectile is traveling close to the speed of light, it's actually traveling the measured distance
Probably more than once.
This is the answer
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