[1] Competing at the 2021 European Shooting Championships in Croatia, Hegg won a gold medal in 50 m rifle 3 positions, ahead of silver medalist Henrik Larsen.

[4] At the 2022 European 25/50 m Events Championships, he won a gold medal in 50m rifle 3 positions mixed team, together with Jeanette Hegg Duestad.

[7][8] Competing at the 2023 ISSF World Shooting Championships in Baku, he won the team gold medal in 50 m rifle prone, along with Ole Martin Halvorsen and Henrik Larsen.

[10] In May 2024 Hegg won a gold medal in 50 metre rifle match at the 2024 European Championships 25m & 50m events in Osijek, ahead of Serhiy Kulish and Patrik Jány.

[12] His first competition in the Olympics was in mixed air rifle team with Jeanette Hegg Duestad, where they placed fifth, missing the final by a hair (0.1 points).