I believe OT means the Olympic squat style, which is about half way between a BB'ers squat (back straight..bar high on the back..legs medium/narrow stance) and a Pl'ers squat (bar low on the back...legs/arse wide....half GoodMorning, half semi squat)
Quite a few lifters have made outstanding gains in muscle and strength when doing medium weight squats using GVT (10X10's). If you use 300 for 5 reps when squating, try doing 10X10's with 220 or so. May feel like sissy stuff the first few sets, with 90-120 second between sets, but it progresses to harder reps later. The quads will get bigger and you may gain muscular weight in the upper body. A win win experience. Another exceptional leg program are 20 rep breathing squats. A killer but worth the effort if you want to build all over muscular size and in a relative short period of time. Trouble being, not to many trainee's want to work that hard.
What passes for heavy squating now a days is unbelievable. A 1/8 this and a 1/4 that is not true squating. Unless you are intending to work partial reps in a PR and plan it that way. Not to many guy's, in my view, know what true heavy squating is. Funny thing is is that I see many women lifter who use near perfect style in the squat...interesting and also nice to watch. Good Luck.