Different profile bullets will necessarily need to be seated to different lengths. Learn the “plunk test”.
The bullet manufacturer’s load data will have an OAL listed that should chamber in all guns with a chamber cut to SAAMI min specs, which may not be optimal for YOUR gun. Most guns are reamed slightly looser than SAAMI. For bullet manufacturers that don’t create their own load data, their bullets may not match up to other bullets from published loads, and you are on your own to determine proper seating depth.
Basically this is what I do (for pistol bullets). Perform the plunk test to determine how long the bullet can be seated before it touches the lands. (On edit: always back off at least 0.020" from the lands). You may have to seat shorter to fit the magazine, and even shorter still to get it to properly feed/cycle. Then look for load data that lists an OAL for that is closest, but not less. Keep in mind that different bullets will be different lengths, and it is the base of the bullet that determines case volume.
If you have more than one gun in a given caliber, you need to do the plunk test on all of them. You may soon learn that one of them has a tighter chamber than the others, so go by that one.
Err on the side of caution, start low and work up.