Yella--
Don't worry about it. You can and will get big off of 4-6 reps, seriously. I'm going to directly tell you to disregard David A's advice on this one (his routine is quite nice if you're a juice master, like I said before, and will lead to overtraining if you're grappling as well).
Stick with the routine you made up and you will get bigger and it's exactly what I've used to get bigger and stronger (if you want more specifics, I can give them to you). The nice thing about a routine like this is that you'll optimize your strength levels.
If you want really good advice on training and lifting, skip the UG and go to
http://www.drsquat.com. Lots of knowledgeable people there, including Hatfield himself. Also, check out some of his programs there as well.
Just stick with the program and give it a go.
Atomic