I've been looking at the cole tac boss bag (standard not the big) and while it seems like a great product, I haven't found any reviews of it. Does anyone here have any experience with it? I'm looking for a square shaped rear bag to replace my cylindrical rear bag for bench and prone use at the range. I get some side to side movement with the cylindrical bag I'm using at times and I'm looking for more stability. I like that the cole tac has the strap to roughly adjust the height and firmness of the bag. And for general info, the bag will be used with a 6.5 in an aics chassis and a varmint ar with a luthar stock. I'd also be open to other square shaped bags like the tab gear if need be.