Thanks for the very informative replies guys. I have been carrying the 54234 six pedal JHP in my Gen4 G27 with a G33 barrel. I thought a little extra velocity would be good in the shorter barrel. Maybe I should try the 53918 five pedal design for greater expansion? I'm currently trying to buy a Gen4 G32 with my GSSF coupon, waiting for my blue label dealer to get a shipment in.