If you want a bullet that is going to exit stick to 180 grain bullets or a premium like the Partition or TSX.
Weight doesn't matter anywhere near as much as construction.
Even a 150 gr Partition is likely to exit, when the SST did not.
And, a 180 gr SST is just as likely to grenade and not exit, as the 165 gr version.
SSTs are designed to expand rapidly and quickly dump a lot of energy into the animal's tissue/organs, with no real intent to exit. Regardless of weight, the design is the same.
"Controlled expansion" bullets like the Nosler Partition, Swift A-Frame, etc. are designed to open slowly and penetrate as far as possible. Regardless of weight, the design is the same.
Construction, not weight.