I used the 100 gr. NBT in a Remington 700 Classic SS I had for a few years. They tended to blow up/fragment terribly if the shot was under 100 yards. I was running them about 3100 fps. I switched to the 115 gr. NBT and they ran about 2925 fps and this corrected the issue. I sold the .257 Roberts a few years ago & replaced it with a custom barreled Howa 1500 in 25-06. I had at least (6) full boxes of the 100 gr. NBT's left and I loaded them to about 3350 fps & have taken several coyote's with them & the explosive effects are pretty impressive. I would in no way use them for deer as they often explode on coyote ribs at high velocity. I do know that Nosler thickened the jacket of some of the Ballistic tips several years back & I can attest to that for the 7MM 120 gr. NBT. I run those in a .280 Rem. at about 3200 fps and they will pass completely thru on broadside hits at whitetail. They may actually be a little too tough. I also load them for my cousin in his 7MM-08 & he shoulder shoots exclusively & puts them down on the spot. Often I've seen the bullets lodged under the hide on the offside with a good mushroom and no jacker/core separation on the bullets he's recovered.