Nothing long but I killed a whitetail doe quartering away at 175 yds with a Sierra 140 gr SBT mv 3200 fps. Bullet entered right at the back of the ribcage and penetrated through the ribs on the offside shoulder and made a golfball diameter hole in the off shoulder. Bullet was not in this hole, I'm assuming it fell back into the chest cavity. This doe dressed probably 50-55 lbs and I would have expected an exit with that bullet. Deer only ran about 30 yds but I wonder what performance would have been like on a much larger deer.
I have an 8 twist barrel put back for a future build, thinking a 30" 264 mag and will probably use the 140 gr Berger or JLK VLD for deer size game. I too am curious about long range performance results of this type of bullet.
I have a couple deer over 600 yards, with a 260ai and 140 a-maxes, total of 15 with that bullet and gun, and all were one shot kills. Only had one bullet brake apart, on impact with the shoulder knuckle of a mule deer.
Whitetail buck at 525 yds with a 140 gr SST, complete pass through, dropped in his tracks.
Whitetail doe 390 yds 130 gr Accubond, again complete pass through, this one took a few steps before figuring out it was dead.
I have shot a few inside 300 yds with the 130 gr Swift Scirocco and have no complaints at all. I've also shot a couple inside 300 yds with the 140 gr SMK, not overly impressed with the results. Both were dead it just took quite a bit of work to find them.
Shot three Roe Bucks with my 260 without getting off my belly spring 09.
Ranged them @ 102m, 244m and 452m(494yds) no wind, worked out the dope, shot the first in the head, the second ran off twenty yds to the side on hearing the shot, dialed and dropped him. The third was totaly unaware of what was happening (I love hunting with a suppressor) gave me plenty of time to place a 129SST behind his shoulder. Dropped like he'd been shot in the head. The only problem was finding him in the 2ft high grass!!!