I spent a fair time as a kid at my uncle's farm and learned to shoot. I'd much rather shoot a fox taking lambs that hunt it with dogs.
I joined the local hunt for their Boxing Day hunt and will NEVER support hunting with dogs after that awful experience. The fox was terrified and exhausted when finally caught and torn apart by the hounds.
I met my ex when he worked for my uncle. He was into target shooting and vermin destruction. He's my ex for a reason but I'm still terrified of him as he still has both a shotgun and firearm certificate, several guns and is cunning enough to keep them despite threatening anyone (including me) who crosses him.
I'm safe unless he gets diagnosed with a terminal illness as he's always said he'll take anyone who crossed him with him. He's too much of a coward to go to prison or take his own life.
Please don't tell me I should go to the police. He's a cunning bloke and it's his word against mine. They never listened when I went with a complaint of domestic abuse and as soon as he realised I'd involved them he went straight to the station and surrendered his guns (the legal ones - he has other illegal weapons but the police would never find them). He was termed a sensible and level-headed man by the police who told me they weren't following up on my complaint.
Everyone who knows him in passing says he's a lovely bloke but I know him and his shooting mates extremely well. They're not.
So, OP. Would I get involved? I'm not sure. My current partner (15 years) also has a shotgun licence but only shoots clay pigeons. He's the polar opposite of my ex.
I'd be okay with someone who shoots as a hobby providing no red flags popped up later on. At the first sign of any kind of abuse, I'd be out of there. Take it slowly and keep your independence. Always listening to friends and family if they have legitimate concerns.