If I may step out on a limb here - Barnes TSX and TTSX may very well be the best hunting bullet out there. At the very least it is equal to the best out there. Here is why I love this bullet.
-Big for weight - I can load a 150 gr tipped TSX in my 7mm that might as well be a 175gr because with the all copper bullet it has a much larger volume as the same weight bonded bullet. Copper weighs less than lead, so a 150 gr bullet in all copper is larger than a 150gr bullet that is lead bonded to a jacket. This works out well because you get a faster bullet that still has the size of a large for caliber bullet.
-Weight retention - Typically on a bonded bullet, you end up with about 60% (+ or -) of your bullets starting weight when it is recovered. The rest has come apart and you will find slivers of bullet throughout and around your wound channel. If you recover a TSX (doesn't happen often due to incredible penetration leading to through and through shots) you will find the TSX to have about 98 or 99% weight retention. If you think about it, the more weight/mass/volume you have pushing through that wound channel, the better.
-Penetration - You almost always get an entry wound and an exit wound. I have seen few bullets equal to the penetration you will get out of a TSX, I have seen none that have better penetration. The only times I've seen TSX bullets recovered after taking game is when it was a head on shot or a sharp quartering shot, when the bullet is traveling the long way through the animal. Every single shot I've made broadside into the boiler room has penetrated and liquified the heart and lungs and come screaming out the other side. I'll try to dig up some pictures I've taken.
-Almost perfect expansion, every time - I've seen some pretty shitty expansion on bullets that were the next big thing. I have yet to see a TTSX recovered that was not a beautiful perfect four petal expansion. Even the ones I've seen shot into trees come out perfectly expanded. This is a huge selling point with me as the wound channel is brutal.
-No metal particles in my meat - I couldn't care less about the lead issue that some scream about. I just don't like having to watch the meat for metal particles. The TSX has little to no loss of metal as it passes through the animal. I know this isn't usually a huge deal, but I feel it allows me to salvage more meat.
Go to their web page and watch some of these videos. I have found them to not exaggerate in the least little bit.
http://www.barnesbullets.com/information/high-speed-video/
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