From everything that I have heard or read about space and it characteristics of it, the question is, how would a bullet keep going. A rocket still has to have a burn once in a while to get ot the moon. I was always told that as soon as the bullet leaves the barrel of a gun, due to lack of gravity, it will keep going but the question always remained, how far, how long, and how strong. Light passed through a vacuum very easily. Other types of matter still has variances on its travel. Plus, there are different types of gravity in space. Scientist are now coming to a conclusion that space has a lot of characteristics we do not yet comprehend.
Yes, blasters have been done a lot but even today, bullets are becoming obsolete and missle are the anwser these days. I am just saying that in Battlestar Galactic, it is a technological advanced race but they still use bullets and cylons used nuclear missles.
I hope I am not p#$#%%# anyone off. Not trying to. Just my own stupid opinion and if a bullet is an effective weapon in space, then I should probably go back to school and retake my science courses again.
I am sure it will be a good series to watch, and I will. Atleast there might be some great looking scratchbuilds coming from it.