I hunted with a 14" 7mm TCU for years. I tried many powders like IMR 4198, H322, IMR 4227, IMR3031 and finally settled on IMR 4895 with a 140 grain Nosler BT. It would hold 100 yard 1.25" groups all day. I had a 2X Leupold mounted, even with that a 3", 5 shot group at 200 yards was the norm. Sighted in at 100 yds, the impact was 10" low at 200 yds. At 200 yrs. I used a 9" paper plate for a target, I would quarter the plate with the reticle and squeeze off. I took an 80 yard shot on a 4 point muley head on in the upper chest, when we skinned the deer the perfectly mushroomed bullet fell out of the hide in the flank area. The deer was dead by the time I got to it, it never moved out of it's tracks. We were hunting at 5600 ft. with 40 mph winds, 18 inches of snow in a blinding snowstorm, my buddy was about 60 yards away and never heard the shot, he came walking up, whispered "did you see anything", I pointed to a mound of snow on the ground. It was 9:30 in the morning, got the deer to camp at 9:00 that night. There is a lot more to this story, like my wool weighing 70 lbs. covered in ice, my buddies rifle action completely covered with ice, had to set it by the fire, let the ice melt before he could unload the rifle and a horse packer rounding a corner on the trail when the horse he was riding spotted my deer laying just off the trail, spooked and bucked one mad rider into the Mad River. That was 37 years ago and seems like yesterday.