I have never had a NBT failure either and my bag with them includes:

5 dall sheep
2 gemsbok
1 zebra
4 red stag
12 caribou
1 ibex
assorted smaller African plains game

with SST bullets you can add chamois, tahr and mule deer

I fact, the only animal I have ever lost was a kudu that I shot with a .338 and 225 Hornady SP. I think the bullet went below his spine in between his lungs. The PH slapped me on the back at the shot, but the kudu got up and ran away. That bullet and cartridge combo remains a favorite, however, and I have used it to kill more stuff than any other bullet and cartridge combo.

ive never asked my gunsmith how he cut the chamber. i took a bullet and used a black magic marker and colored the bullet. i seated the bullet till i quit getting a rub line on the ogive of the bullet. i then measured the overall case length and worked back to the rub point. im just barely off the lands. depending on the bullet type, im either deep in the neck or partially seated in the neck. over the weekend i shot some 139 grain interbonds at 3.535 and they shot great. .35" at 100 yards. the bolt is not sticky at all. the older nosler loading manual called for 60.5 grains of rl22 as max but the new called for 63. the 63 is really full ie; up in the neck but doesn't compress to much because of the seating of the bullet in the neck. just comfortable against the powder. we'll see where their at. i show no signs of pressure at 60.5. the 63 is quite a move up. thanks for the web site. seating way out to just off the lands has been the key for me. 140 ballistic tips, 140 sierras, 150 nosler partitions, 160 sierras and 120 grain prohunters. again, thanks for the site info.