In PH situation that hunt, 5 rounds could be nice,, client wound animal, you see its very bad shot, put two shots in while animal is running away. next thing, animal turn and charge you and client. Then its nice.. For a guide, maybe not big factor...

the 416 Rigby is awsome.... But expensive. when you out and about all the time, you WILL lose cases. And if you running Rigby, that replacement cost is high. The standard ammo cheaper, easier to get if you live far away. So better for guide to stick to standard. But... still great choice for dangerous game.