I really like the 7mm Rem mag,I hunt some fairly large crop fields where any where from 10 yards to over 350 yard shots are quite common.
I use a handloaded 160 grain Nosler partition bullet traveling 3100 ft per sec. zeroed in at 200 yards,it's only 34 inches low at 500 yds. and still retaining over 1700 ft. lbs of energy at 500 yds.
My longest shot with the 7mm rem mag was actually a buck and doe in the same field. I saw the doe first feeding she was 489 yds with my rangefinder,squeezed off on the trigger and she disappeared,that's when I saw the buck running,once he gave me a stopped broadside shot the 7mm rem mag dropped him in his tracks at 506 yds.
I love that rifle and cartridge!!