I used the 250gr BT on two trip to Africa and took several heads of game with it. I was generally pleased with its performance. It is a tough bullet, and I load mine over H4895 to about 2700 fps. This is a very well balanced load: power, flat, and terminal performance.

I would agree that it is not the bullet I'd use for big bear, but with black bear it would be enough. Ku-dude

Hardly a TEST but I've put a box+ of the BT's through my 9.3x62 so far and can attest they are very accurate. The only animal used as a test bed was a mature porcupine at about 80 yds. A 250 BT at 2350 muzzle velocity WILL kill a porky with one shot at 80 yds. Like I said hardly a test.

As you probably know the larger caliber BT's are supposed to be made with thicker and tougher jacketing compared to their under thirty cal brothers. So for most large game they are probably fine. Especially at the velocities you will use in those two cartridges.

FN in MT

The .375 260gr Noslers with the white tip are Accubonds. The BT's are a light green color. A buddy of mine shot a small whitetail with the BT's last year and the hair literally flew off of that thing. If I was going after bear, and especially grizzly, I would use a minimum of a Accubond with a tougher bullet like a swift prefered. We have done a lot of phone book testing on the 260gr Accubonds and up close they tend to lose a considerable amount of weight but expand to about 2x bullet diameter. The test were done with a 375 RUM (around 3100fps at the muzzle)so a H&H might be fine at close range due to lower impact velocities.

My friend uses 260 gr. NBT's in his 375 H&H. I load them over Varget for 2700 fps. He's used them on great success on deer, from 40 yards to 300+. I'd think it would be a good choice for anything up to large black bear, elk, and moose. For grizz I'd go for a 270 gr. XLC or a 300 gr. A-Frame.