Originally Posted by Darklen
Odd. I've experience the exact opposite. A 0.25g bb will give you about 20 feet or so less range the a .0.20g bb out of the same gun
We're dealing with physics here, so the facts really can't be argued, but be aware that you also have to adjust your hop-up properly between weights, or you will loose range.
The first link probably used MatLab or similar to calculate the results, but if you need real world results as well: http://www.arniesairsoft.co.uk/forum...pic=38192&st=0
You can see that after 65 feet the .25 gram BB is moving faster than the .2 gram BB so it will go further.