I hunted bushbuck in South Africa on irrigated crops. We could see bushbuck coming out of the riverine scrub from 150 to 800 metres away. I used a scoped .375 so it was a little problem for long shots but managed to take a very nice bushbuck at around 160 metres.

A scope in reliable QD mounts would be a good idea for a plains game rifle for which you want to use mainly open sights.

It made it into the thick scrub and needed a finishing shot.