the main problem with open glocks are WT. and you have to load short 1.145 because there mags wont take loading long. That is a nice looking build i started open with a open glock 17
AA#7 10.4 under MG 115jhp 1.170 make sure you start low around 9.7 and work up. Ive used autocomp for a year and some HS6 and AA#7 is the way to go. Ive also been playing with 124CMJ over 9.7 AA#7 at 1.80 nice load.