I am shooting a 14 " 7x30 waters. The only 140 gr bt I have recovered was about a 50 to 60 yard shot on about 160 to 180 lb. deer. It started as a good shot turned bad . He was standing broad side and just at the point of no return on the trigger pull he jumped ahead and spun went about 30 yards and laid down. I could just make out the movement of him lifting his head a couple times so stayed put for a good 45 min.When I did aproach him he lifted his head again and I put one through his neck. When I skun him out I found my first shot had hit him in the left hind guarter and well butchering I found the slug in the right front shoulder minus the tip but perfectly mushroomed. I would say that is pretty good penetration even for a lot of rifles. No I do not feel under guned, the only time I carry my 06 rifle is when I set a power line or a slash where shots could get over 150 yrds. or I feel I wont be able to get the proper bracing to shoot the tc. The partion bullets very well may be a better choice, I don't know. I have never felt the need to check them out and see if they will perform at handgun vel. Now the guys have got me thinking I will have to check into it.
As I said, the real trick is waiting for the small opening to put the bullet through. Any time you hunt brush country you are going to hit a small brach, sappling or something and have bullet deflection sooner or later.