Logging the components yields the SphereComponent for other (Projectile) and Mesh for hit (Target) both times. Targets (as of right now) only have a StaticMesh, no separate collision capsule component or anything, but for the sake of testing I also tried removing the mesh component from Projectile so that it only had it’s sphere collision component, but even then it was still triggering Target’s OnHit twice. For the time being I’ve implemented @SolidGasStudios solution with the modification that Targets are checking the name of the OtherActor each OnHit instead of just using a bool, as I plan on having some Targets taking multiple hits from multiple sources before going down, and for now it does the trick. However, I worry that if two Projectiles hit a Target at the same time, the OnHits may get layered such that P1 Hits for the first time, then P2 Hits for the first time, resetting the tracking string to P2 before P1 Hits the second time, resurrecting this issue down the road…