It is probably going to land on the tailcone. I have an 18" drogue and a 54" main. I am using an Adept 22, so the main deploys at 600'. Landing speed should be about 16-18 ft./sec.
Haven't registered yet but I do want to fly at URRF. I simmed this with a J530 and it goes about 8,200-8,400' up. I have 21" of room for the motor. It will hold a 6xl case easily. If your 10-grain motor will fit, this thing could go way high.
I think I'll test fly it with an I-800 at the MARS May launches.