This is from my CZ P07:
Berry's Flat Point Hollow Base Thick (copper) Plate 124 grain
OAL needed to be 1.05, the shoulders engage the throat at anything longer during "push test"
4.35 grains Ramshot True Blue
Ranier Ballistics Round Nose Hollow Point 124 grain copper plate (neat round)
OAL 1.1
4.35 grains
Will get a Chrono set up soon and will update with results.