I don’t have this mold but it may be one of those that a sprue extender May be just the ticket. Looking at the mold, there’s a lot of cavity for the size sprue. It appears the gates are large enough to not close off too soon. Also, colder plastic is the way you want to shoot this one. I’ve had luck shooting down to 290 but not much cooler than that. Be sure and use a thermometer as anything else is a wag. I would hold pressure on it too for 15-20 seconds.