I know black bb's generally are worse quality than the white ones (I have no idea why) but if you used black bb's, you wouldn't be able to see them flying, so people won't try to dodge as much. I know I won't be able to lead someone enough to hit them running horizontally, but you should still be able to hit them if they are coming towards or going away from you right? 250' with 330fps, so lets say 250 average velocity (total guess right now) so that's about a second, which isn't terrible.

Has anybody ever thought of getting a laser range finder, and getting a metronome? If you do your range/average muzzle velocity, you get a time value. Once you have the "rhythm" in your head, you can estimate alot better where they'll be in the 1 or 1.1 seconds or whatever. (assuming they're moving at constant velocity no wind etc)

You're forgetting that BB's start slowing down as soon as they leave the barrel.

If I can get 0.30g BBs out to 300ft easily (looked like they were floating out there and maybe a 20ft grouping, but still made it to that distance high enough to hit a standing person) when my M24 was shooting 340fps one time for a CQB game with 0.20g BBs........... why wouldn't they? All ends up being hop up adjustment. Heavy BB and hop up trumps velocity every time for range.

Then wait until they stop staring at you before you fire. Sheesh! Lol ;)

You know I've been running my M24 the past year at just under 400fps (loving it) and have been using 0.36g Bs, right? And 200ft is easy for me, and past if I need to. Of all around here I'd expect you minimum to have paid attention to my raving about that velocity and ammo, even if it only comes out my barrel at 300fps.

That's about as lame as a guy using a calculator to set his scope vs. distance to................. works for real steel, for airsoft it's non-existant and one would have to be a mathmatical genius to create a working formula, only to find out it won't work either because of the variability of air currrents between the shooter and the target.

Well, the formula only has to be as accurate as the bb, so not very. Maybe find the distance where the velocity of the bb is mostly linear (it should be an exponential function), so I wanna guess maybe 50-100 ft before the velocity curve levels off. I don't know...

For the bb's slowing down, I guessed it'd end up with 250 fps when it hits, which I guess is a little high. Maybe it'd be closer to 50? So maybe 3-5 seconds.. which is worse ><

He claims to be able to use it out to 300ft. Knowing the way BBs fly and how unpredictable they are past 200ft, I really can't see how he uses the mildot and calculator to sort out how many clicks to set his scope, or to hold off. Me, past 150ft, I just send a tracing round out first, then go for holdoff. Much simpler and faster. Lol

So, from your experience, would you rather have a tightbore and 500fps or a twist with 340 fps? (I know you said hopup+heavy>velocity, but I'm trying to decide) Heavy bb+low velocity=even less range, even with hopup? Or when you shoot the bb do you aim low so the bb will swoop up?

I made the formula and ballistic table for various BB weights and fps. It work, but like Stalker said, it's as acurate as the BBs is. Wich translade to an educated guess on where to put your hold over or hold under at a set range.

And for the record, I'm far from a mathematical genious. I just used the data compiled by CyberSloth from the airsoft trajectory project and came up with a little formula that take the mildot ranging formula into account.

Since mildot ranging under 500fps is kinda sketchy, this also translate into the innacuracy of the shots.

I know that some people spend a bunch of money on airsoft, so I'm wondering if someone would buy a real intervention, and tweak the program for the wind speed air pressure etc... lol.

Ah, ok. I still prefer the test shot. :P