weapon problem

[Ryu13]

im on hard caves and spaceship and i am finding stuff from the caves such as brands and autoguns when im should find palleches and railguns. i have only found 1 of each. and when u beat the dragon on hard or barba ray on hard arnt u suppose to get a rare. i have don both 3x and only got a monomate and monofluid from both.
p.s. my section id is Redria

[TedEdFred]

It's random when you get a rare from a boss. You don't get one each till you kill it. Keep trying.

[Zeebo]

It's all random 1/10 shot your going to get a rare i think if you get it every time it would not be a rare would it........