leadslinger; yes everything drops the moment it leaves but what if the trajectory matched the curvature of the planet, would that be considered "flat". Like the ocean is flat yet it is not, so along that mentality
Then there's coriolus so really that would only work in either east or west shots, not both. Would it not be awesome to shoot a bullet on a no atmosphere planet and that that sucker orbit at xx inches off the surface for however long? Years? I also recall mention of bullets, especially aft heavy bullets like your example, that would surf the air and not drop and the 33ft/sec like they're supposed to. My guess is any normal bullet (not so much pellets tho) would do that for long shots. If angled up 10 degrees then the bullet will try to stay pointed up 10 even tho the trajectory levels and drops until impact. Surely it gets some surfin action outta that, but how much I don't know. I just remember when I was reading about it the shooters had to factor that in. Basically they had the estimated data based on math, then how much the bullet actually dropped, which were not the same. I'd imagine that's one reason boat tail bullets work a little better than non BT? I'm picturing less drag when in surf mode...
YepYep; I'm sure you know much/most of the following but tmi is better than not enough, or for whoever else that may bennie. Sorry if I'm repeating anyone bc I only skimmed the thread. So; the free program "Chairgun" will do a pretty good job of predicting trajectory and it's an excellent tool to get a visual on what's up w/o having to do it manually over a ton of shots. I believe it'll also do <5m, but I've never tried. Not that much happens in 5M but you could try. Or another way of looking at it is to get really accurate you need to do it manually (old school), but Chairgun gives you a clear picture of what's happening so you have a better understanding and head start when you start doing it old school. Example; the poi being lower at shorter range is shown very clearly. It also factors in scope height which I really like. So as people have no doubt mentioned you always have an arched trajectory (with a pellet, BB's don't count) and the scope only sees a laser straight line. So I sight my scope to match the pellets trajectory, so basically the more fps the further out I zero it. I generally do it one of two ways; one is I'll set it so the pellet hits ~1/8" above the scopes reticle at its zenith, that way the pellet is +-1/8" of the reticle for a good stretch of distance so I don't have to think about holdover much. So lets say 30yrds is zenith, then at 20 and 40 it's spot on, 30 is 1/8" high, and 10 and 50 it's 1/8" low. So close enough for hunting from 10 to 50yrds. Those are just unrealistic example #'s to make a point, but it gives you a "no thinking" window, just point n shoot. Option #2 is actually better, you just have to think: I'll set the reticle to the zenith exactly, then keep in mind that the zenith, lets say 30yrds, is the only point it's on target and I have to know the holdover for whatever distance before or after 30yrds. I'd also like to add that I like my scopes as low as possible, mostly for looks but also bc it makes that 1/8" high/low zone I mentioned longer and less compensation needed when out of that range, like when shooting close. That also applies to the #2 zenith only setting so a low scope is a win win imo. Since you wanted more velocity for flatter trajectory I thought maybe you'd be interested in that. That and getting the most velocity possible with the heaviest, or I should say best BC, pellet you can find. I'm partial to the JSB 10gr and the Baracuda Match. The JSB 8.44 also has excellent BC but may be too fast, the JSB 13.43 is likely too heavy/slow unless you have a magnum, but I don't know what gun you're using. I'd plug in all kinds of #'s into Chairgun so you get a feel for what affects what, by how much.
A lot of people, maybe most, don't sight to the zenith at all but instead to whatever random distance they happen to use. Maybe bc the target says 10M on it they do 10M, or maybe the fence is 12M from the porch so 12 it is... If you sight to 10 or 12M you're screwed when you go out plinkin/hunting bc the pellet will go higher after that 10-12M mark, and the higher you scope sits on the gun the worse that is (assuming 12+ftlb gun since that's what I know). Then whatever lucky animal at 30M is further than the sighted range so they add some holdover, and they miss. It may take a while before they figure this out, and I think most never go to zenith, they just get closer and call it good enough. If you only shoot at 10M then set it to 10M (or whatever fixed dist), otherwise it's a bad idea, imo.
Anything within say 50yards is fairly easy to compensate for drop, <500fps not so much but chairgun will tell you that too
The further you go the more drop per Meter you get until at, 100M for example, it's just ridiculous. Plus the further out the harder it is to est dist so shots at say 60-80M+ may be a pot shot first to see where it hits. That's fine for plinking but usually not so good for game, unless it's a Dove, which I recall will just sit there with a "what was that?!?!" expression until you finally make contact.
Chairgun cannot compensate for transonic losses, which start ~890fps and get worse as you go on up to the speed of sound. It causes the BC to get much worse (more drag) but if you're at 925 I spoze you can ignore it, if at 1100 you're screwed and the app will be way off. You shouldn't be shooting at 1100 anyway bc aside from the power loss it also upsets accuracy. Chairgun needs Java and/or NET Framework 3.5? I forget, but it needs something before you can load it and it'll tell you. Then you need your actual pellet wt, BC and velocity. What you don't have you'll need to est. There are BC #'s online, or you can email me and I'll send you the collection I scavenged from the net. Velocity is really iffy if you don't have a crony, if so you'll just have to guess there too but guessing at all these #'s is still better than nothing. As you may know most springer mfg's lie about that velocity so don't use their #, get an avg real user # from me/us. Another note is a heavier pellet (on avg) has better BC so while it's close range trajectory will be worse due to lower speed, it's long range traj will be better. As a result the heavy/better BC pell will travel significantly further than a lighter one, which you can easily test if you have a big lake or dry dusty area to see the poi. Picture throwing a rock vs a shuttlecock which likely has the worst BC of anything meant to fly, excluding a balloon. You can launch that shuttlecock at mach 10 and it's not going as far as the rock doing 200fps. So a 4gr Crosman at 1400fps vs a 10.5gr Baracuda at 850, the 4gr even has more power in this example but the Baracuda will have more range, maybe even more than double the range.
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