maybe its just me, but the reason I say they are a different animal built heavy and set up for extended range is twofold actualy, before I get started I apologise to the OP for the hijack.
I have 2 large 7mm's, the first is a 7mmstw, rem. 700 action which has been trued and accurised, 28" lilja 9 twist #5 contour barrel, 6.5x20 leupold vari-x III. runs a 160 accubond at 3340 fps. my main hunting load is a nosler 140 BT at 3550 fps, averages 3/8" at 100 yards. It tips the scales at 8 lbs. 2 oz. I have taken 20 some deer and a couple bear from 40 to 600'ish yards.
the second is the 7mm Allen Mag, 700 trued action, 30" 9 twist lilja #8 contour, 6.5x20 leupy mark 4 M1 TMR, runs a 160 at 3575 fps averages 1/4" at 100 yards weighs in at 14#
the allen will group 3-4 inches consistently at 750 yards, the stw will not break 7" at that distance.
However the games reaction to a solid hit at 200-400 yards from the stw can't even be compared to my 7mm-08, or my 7mm RM, its just totally different, only 2 animals have taken a step after being hit, the rest just melted to the ground to never even twitch.
I often wish I would just rebarrel the stw to the same chambering with a 30" #7 contour, add a stock that would get the weight up to around 12#, and load it up with a 200 gr wildcat with a BC of .84 running right at 3K and see how it will compare to the allen, but long as it kills like the hammer of Thor to 500 yards, think I'll leave it alone.
RR