The entire posterior chain is the prime mover in the low bar squat, but you're still working the rest of your legs to some degree. You're actually working ~250 muscles in all with a squat, if my memory serves correct.
I don't really shoot my ass back, I have quite alot of forward knee travel and slight backwards hip movement on the way down.
On the way up I drive my ass up making sure my upper body moves in unison.
I don't feel it in my hamstrings on the way down, only on the way up, it seems like my legs and core and back are responsible for the lowering and the hamstrings and glutes are responsible for driving up.
Its like on the way up my hamstrings stretch and feel like a band being stretched out.
It isn't really a powerlifting squat, more a basic strength squat as outlined in Mark Rippetoes novice program.
Its great because I no longer have horrible pain in my IT band/patella like i got from high bar.
No, I never ran that. The only program I have ever ran was a beginner 5x5 full body program I got off of some other muscle website. It did include front squats, which I think pair well with low-bar squatting.
I'm still working with the same basic template, but I've recently dropped front squats to have two days per week with low-bar squats. I have been happy with this, but squatting heavy twice per week has me considering dropping low-bar squats on Friday and doing front squats and RDL's for legs on that day again.
Or I may just take up 5/3/1. I'm sorta winging it now and would most likely benefit from a bit more structure.
I was running GSLP, and I'll be getting back into it very soon (been disrupted with some life-stuff and injury-stuff) but I'm thinking of doing it with front squats for awhile.
My knees seem to be a bit weird with back squats right now, so I'm hoping front squats will help.
I've been using touch-n-go mat pulls instead of dead-stop deadlifts so I'm already hitting the posterior chain hard. At this point my thoughts are that maybe that my knee issues are related to not enough quad work.
For whatever that's worth.
I just look at GSLP as a good basic template that will still work well with a bit of customization in lift choices.
EDIT: you could just do something like front squats Monday, and low-bar back squats Friday too. Much like one of the templates he provides in the book with using two bench variations.
I honestly feel a Low Bar Wide squat is much more all over better developer of the legs. When I high bar I feel it in my quads and sometimes my Glutes. Going wide I feel it in my quads, hams, Glutes, hips and lower back even.