Sorry for ressurecting the old thread. If this was already discussed in some other thread, sorry, could not find it. Please point me to the right place.
This is a great guide, but I have noticed that some other people advise to fill mags with 3sec bursts as opposed to one 5-6sec burst, in order not to freeze o-rings on the fill valve. I would imagine you need more than 6sec for, say, WE M4 mag, since it is larger than handgun mag.
So, what in your opinion is the best practice for filling GBBR and handgun mags? How many BBs do you usually put in your mag? I personally find that 6sec is not enough to fill WE M4 mag in order to fire all rounds for 20°C.