Flip your grip and the bar drives straight into your upper chest.
Keep your wrists stacked and elbows tucked, have a spotter since the underhand grip is less stable.
Flipping to an underhand grip forces the elbows to tuck and changes the bar path so the pressing stress lands higher on the chest, which is why lifters chasing upper chest development use it. The triceps work heavily through the tucked-elbow press to lockout. It earns its place as an upper chest builder that skips the incline bench, though the less stable grip means it demands respect, a spotter and conservative loading.
Yes, the underhand grip and tucked elbows angle the pressing line up toward the upper chest even on a flat bench. It is a legitimate alternative angle to incline pressing.
The underhand grip is genuinely less secure, which is why the setup calls for a spotter. Keep wrists stacked, use a full firm grip, start light, and never max out on this alone.
Incline is simpler and more stable, reverse grip gets at the same region from a flat bench with more triceps involvement. If you have an incline bench available, that is the easier tool, this is the variation for when you want a different stimulus.
