Kevin,
Very very likely the gun(s) is too short for you, but not absolutely for sure. IMO, proper LOP is determined by things such as distance from the center of your body to the "pocket" in the shoulder (how broad you are), neck length, head size/shape. I believe arm length and how tall you are plays little role except that most tall people are proportionately bigger overall, wider in the shoulder and longer in the neck.
There are so many variables that nailing them all down is really not practical. That's why measuring with a try gun or several guns is more practical.
I highly recommend Michael Yardley's book on Gunfitting, if you are interested in do-it-yourself fitting.
But back to these guns swatting you. I think the drop and more importantly, the pitch may be wrong for you. Lengthening the LOP may help or not. But definitely get the LOP where it's proper for you first, then play with the pitch. A slip-on pad is ideal for this. Simply cut some tapered shims from wood, plastic or rubber to put in the slip-on pad.
