Disclaimer: I don't own a 9.3x62, so I have no personal experience with it. That said, I have lots of experience handloading the 375H&H with Barnes 270gr TSX's and taking many Alaska moose and several grizzlies with it. I'm pushing around 2800fps with that load. Also, I prefer calling moose close to me, so nearly all of the moose have been taken within a hundred yards, as well as the grizzlies...one grizzly was within ten yards.
That said, I have recovered very few bullets. All entered, expended and exited the other side, very effectively putting the animal down...exactly as I prefer. An image of a recovered 270 TSX from a moose is below. Notice that the bullet is fully intact without missing any petals. This bullet was a neck shot quartering towards me...it traveled several inches of cervical vertebrae and was under the hide on the far side. BTW...the few recovered bullets that I have are all exactly similar to the image.
It appears that your velocities/energies with the 9.3 are somewhat less than the 375H&H, and I'm not sure your preferences for shot distances. I would suspect that if you are taking longer shots, then you may want to go the TTSX route to help facilitate expansion and penetration. The question becomes will it hold together well with closer shots and greater velocities/energies.
Hopefully someone with direct 9.3 experience will give you better first hand information. Bottom line...I'd take the one that shot best out of your rifle.
The best to you this fall!
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