TNT... Hmmmm... TNT... Just sounds splashy doesn't it? The .22 and 6mm variants are. But they're supposed to be, because, TNT. Maybe the .20 will be different.
They have a short bearing surface, and make sure the case mouth is deburred and lubed the jacket is soft. I have some loaded up to try, it's just tough to leave the 40 gr Nosler bt.