Normally I shoot color reversal film. Decided this time around I'd try B&W again, and got a roll of Ilford HP5+. My B&W photos always seem to be too contrasty - very seldom do I see very much middle gray. I've heard that shooting at a lower ISO can lower contrast. I'll be having a lab process these as I'm not yet set up to process B&W myself. What EI should I use for HP5+? Do I need to have the lab pull-process the film at the lower ISO or can they just run as normal and handle the different EI at the printing stage?