Might try getting in some power rack lifts. Heavy 3-4" lockouts get the body accustomed to handling much heavier weights. Can be a psychological boost when using 100lbs + over your regular BP. To test this point, after a few sets of heavy lockouts try doing a regular BP. You normal exercise weight should feel lighter. Also in a power rack, set the pins about 4-6" above the chest. BP the bar from a dead stop (at the chest level) until you hit the pins. Hold for a second and lower back down to the chest. Each rep is preformed from that dead stop position. No bouncing or rebounds. Trains the important starting muscles (sometimes overlooked but very important)pushing off the chest. Change the grip to closer, from time to time, in the power rack. Includes more triceps and anterior delts in BP action. Explore different grips from collar to collar, middle and close
Other moverment that can aid a bigger bench are the PBN (press behind neck) Military presses and dips (weighted). I would suggest lying tricep presses, if your elbows can handle it. Some guy's I've trained with use 300lb + for half reps in these (feel free to challenge me on that Sarcasm... anytime). Their benches are huge.
Those incline 400's that Cormier talks about are pretty much middle range, fast reps. Not full range, starting off the chest each rep, presses. Good Luck