Airsoft BB Question?

Question

If an airsoft gun shoots 400 fps with a .20 gram BB, what will it shoot with an .25 gram BB, .28 gram BB, or even a .30 gram BB. What one should I use for best accuracy.

Thank You

Answer 1

It will shoot around 320 with .25 gram BB;s, around 260 with .28 BB's and probably a lot slower with .3 gram BB's

Answer 2

the heavier the bb the slower it goes. however the lighter they are, the faster they go, but the more they curve. So if your looking for accuracy go for a .30 gram, if your looking for speed go with a .20 gram. Personally I'd go for something in the middle like the .28 gram, its just as accurate as a .30 but goes a little faster.

Answer 3

Well the heavier the bb is the more accurate it is, but it will lose velocity. Lighter bbs have greater range but are less accurate.

Answer 4

Test the accuracy, lay on your back with your legs open in the air, and put the barrel of the BB gun up to the rim of your @$$hole, and pull the trigger 4 times for each gram of BB.

Hope it helps!

:)

Answer 5

there is a way to calculate the spring energy using

Energy(joules) = 1/2 Mass(grams) * Velocity(m/s)^2

since 1m/s = 3.28 fps it's easy to calc for your gun, I get 121.6m/s and ~1.49J.  Just solve for the other velocity using the constant energy this is what I get

.20g = 400 fps

.25g = 358 fps

.28g = 338 fps

.30g = 327 fps

If wind is a factor use the highest weight for the least drift, IMO high fps is overrated since you're shooting hot I would use .25g when wind is "average" and switch to .28g when it gets windy.  .3g gets a bit expensive unless you're the sniper :)

cheers