First bugs is c-bug: with deagle and sometimes with sniper and its very popular bug in samp all you have to do is aim + shoot and c (crouch) here watch this so you can learn more about c-bug https://www.youtube.com/watch?v=Cws0nOrVRwA
second one is 2 shots: and that is very important because you can kill people easily with it all you have to do is to shot with sawn off and switch to another weapon and switch again sawn off shotgun and and here is a video about it https://www.youtube.com/watch?v=qxxY20ojpus
and the third one and last one is lag shot: the very usefull bug thats is not well known all you have to do is shoot infront of the player that most of us shot players against you blood comes out and and his health doesnt decrease here is a video about it
https://www.youtube.com/watch?v=um4hfD68FIU
note: if lag compensation is on no need to lag shot
i hope you guys enjoyed i hope this topic made you better than before