[1tonne]

I *THINK* he made one (once upon a time) stating that
"Of course lighter BBs travel further" and he symbolized this by throwing a small stone, and a really heavy stone and of course the small stone went further... Perhaps it was the other way around with the heavy stone going further? Either way, I couldn't help but sit there thinking "this is wrong"

After watching the video about bb weights and distance (where he throws the stone) I believe he is correct (It is a very unscientific way of showing it but in principle he is correct). A lot of people in the sniper realm seem to think that the heavier the bb the better but that is not always correct. If you go too heavy then your gun just won't have the velocity to push it out very far and to get the distance the bb will have to be lobbed to the target (As shown when he fires the 0.42gm bb's). (In my time of experimenting with bb weights I have found the same thing) So this is where high FPS springs come in useful as you will be able to push heavier bb's.
How far would a 10gm bb fire from an 450fps airsoft gun? Not very far at all. You would need to up the FPS an incredible amount (Too big for our springs)

 

[1tonne]

Yep... but then energy creep comes into play, and pushes heavier bbs with more energy than lighter ones, and thus makes them go farther away.

Correct.
What he is saying is that there is a point to where the heavier bb's will be a disadvantage. So heavy bb's are good to a point and then you may go over the optimum point and they may be a disadvantage.

 

[1tonne]

I'd like to throw in that this is why I edited my post with an apology at the end.

I re-watched it and also realized he was correct too. I don't know where I got the "he's wrong" thing from, and again, sorry for that.

He's always very careful to say that a gun with "more power" (he never says fps) will generally shoot further than a gun with less power, making me believe he knows a lot more about energy creep than he is letting on to his Youtube followers. It's a secret only the l33t keep

All good
It's not too much of a secret though. More just common sense. Cheers

 

[1tonne]

This is actually not correct with the current weight of BBs we have. A .43 and a .36 at .9J (which is 212 FPS and 232 FPS respectively) will both travel about 210 feet flat, the .43 is actually a flatter trajectory than the .36.

If we get into .66 then this becomes true. a .66 at .9J (171 FPS) will only travel about 150 feet. The reason is that the hopup takes effect pretty much straight from the barrel instead of at a distance because of the slow speed.

But since we don't have .66 yet, using .43g BBs is 150% time better than using any other BB at the same Joules.

I am beginning to think your secret formula you have for figuring out distance is badly flawed as other have thought this too.
A 0.43gm bb that exits the barrel at 212fps (so using 0.2gm bb's would be exiting at about 310fps) would not be able to reach 64m without massively over hopping. It would be lobbed to its target. So it would not have a straight trajectory at all.
I think you may have to tell us your formula so that others can see if it is flawed. If your formula is correct and accurate you should not be afraid to hide it. If you do not publish it then we cannot take what you say as gospel.
310fps gun + 0.43gm bb = lobbing at target

If you publish the formula then someone on here may be able to help fix it.
Still means it is your formula