I have been using these exclusivley since I first got them ( 4yrs ?) and nothing has required a second shot. From 20-500yds performance has been consistent, rarely is there an exit.
Too light? Might seem so depending on what you are comparing with (weight or caliber).
Out of my 6.5 Sherman @ 2970fps they will exceed the 6.5-.300 Weatherby 127- 140gr factory loads at 1000yds in both velocity and energy.
Helped a friend with his elk last week, ,308/165 Hornady BT , the 6,5/160 Matrix at 1000yds equals the .308 at 500yds.
I prefer to compare sectional density, 6.5/160, 7mm/180, .308/210 are all on par.
Cliff