This is easy. Shoot the TTSX (or perhaps the GMX). These are 100% weight retention bullets. The 120gr WILL (except for the most extreme shot angles/game sizes) exit WITH velocity leaving great exit wounds. Aim at the lower third for the best blood trails. Watch your beyond your target though, I've seen these bullets kill 2 deer at same time 65 yards apart, LOL.
Another tip or 2. The heavier the bullet the better the penetration, but the less emphatic the kill. Most agree to match the bullet weight to the target, so perhaps a 120gr for awesome penetration exit wounds, but 100gr for enough to exit on the smallest deer and dump a ton of energy in the animal.
Hammer bullets are great bullets from most accounts, however they are not designed to be 100% weight retention bullets. They do lose weight and therefore don't penetrate as deep, however they do provide a good balance of pentration and particularly emphatic kills to to there fragmenting design. Many see these as "the best of both worlds", however if it's truly penetration you are after then look mo further than the heaviest ttsx/gmx (a few other 100% weight retention solid copper designs oit there also).
Also, note that these bullets don't expand at as low of velocities as the eld/berger bullets so check your min expansion velocities and respect your limits (still easily reach out a few hundred yards). The hammer bullets expand at lower velocities (ask the forum here for numbers I don't have) once again helping them with their slreputation of a good do-it-all design.
There are a lot of other middle of the road premium bullets that will exit 90+% of the time FYI (nosler partition, trophy bonded, swift a frame, etc.) But the solids are king here. Point is you have been shooting about the softest deer hunting bullets there are, so plenty of room to grow (in penetration).
For what it is worth I like the heavy eldm bullets very much as a good compromise for max range and slow cartridges on small game up close. 147 eldm in creed. But if I want to guarantee exits then that's when the 120gmx/ttsx come out.
Hope this all helps.