When going with bar weight plus chains, I use 225 plus 40 lbs of chain for 10 sets of 3, with one doubled miniband, I use 185 lbs bar weight for 8 sets of 3, when using 2 doubled minis, I use 135 bar weight for 6 sets of 3.
Don't know what my raw max is, but it ain't much. Comp max is in the low 500's by my estimate. I recommend dropping the weight pretty dramatically, by at least the amount of weight equal to the band tension on your chest, and I personally go more than that.
If you are doing 195 with just bar weight, drop to 155 or so when using a doubled mini. Always double the minibands for bench.
Hope this helps.
B.