nostr:npub13syf9xl4w7c94gqvugwsf7y67xpj4s6jm3zpaf5qzl00dkh8hd7sgecysq nostr:npub18994crjwnldrukwym5lz3y2nae84s84v20m2rkngtjnyg549lr6qvxmd6m for my hunting rifles I’m one of these guys, all the way back to 400m for initial and then on a new lot of ammo. 
For a 223/5.56 round 100 is fine, effective range is 300m but most people I see shoot don’t run glass to get that far much less reach out to 600m.