OK first, for context, I'm a clyde with a linebacker frame. Back in the day I could do 425# for three reps. I maxed @ 455# and blew out a shoulder trying 475#. I had to quit benching for a year because of that. And the biggest insult of it all was that my workout partnter put up 525# that day. I hurt myself because I stupidly tried to keep up with him. That's when I quit worrying about max bench. the point is, that no matter what your number is, there is someone who can do more - just like average speed.
Of course, I'm 15 years older now, and even in my best shape (which I'm not in) I couldnt come anywhere near that. In fact, if I could work back up to a max of 315# I'd be really happy.
Besides, your body type isn't meant for heavy lifting. Just like mine isn't meant to fit into euro cut jerseys.