my drive is on a very very slight slope, you cant tell in pictures but it never gives me a warm fuzzy feeling untill its on the axle stands.
I chock the wheels and then take the handbrake off so it rolls onto them. the problem is that it puts a lateral strain on the scissor jack which its not designed to take and its poossible it will bend. it ifs a trolley jack, well they are on wheels, so that could end badly?
so to be safe, No.