Sorry to dig up an old thread, but I was doing some searches since I have the
same exact problem. I was 6'5 310lb 35% bf when I started hitting the gym and I benched about the same as you, yes a 310lb man benching 135. Im 240lb 20% bf now and still have trouble with 135lb. I don't know what it is no matter how hard I blast chest/tris I never "feel" it the next few days like I do after any other workout (back/bi/abs/legs/shoulders). Everything on my body is growing except for chest and triceps, Ive tried every excercise mentioned here and definitely find dips to be my favorite.
Im in a little different situation since Im trying to lose weight and not gain it but it is still discouraging to see everything else growing and going up in weight except for chest/tri. Once I get down to about 15% bf I will start bulking, this may help but Im not optimistic.
Also, I think I may have
http://www.everything2.com/index.pl?node=Pectus Excavatum
This condition, just from the description I think it applies to me although Ill have to see a doctor about it.