Bwana,

Take your .405 and enjoy your safari. Do not let your PH spoil your fun like the PH who guided AussieMike spoiled his. It is YOUR safari, YOU pay for it and YOU choose (within reason) the rifle/muzzleolader/bow/spear/javilin that you wish to use. It is the PH's job to evaluate your ability with your chosen weapon and then get you close enough to use it for a quick humane kill within your abilities!

I would much prefer to have a perfectly happy client that stalked a 11" territorial springbok to within killing distance of his .50 patched ball shooting smoke pole, than the same guy with a 14" springbok shot from some impossible distance with a modern magnum firearm, while he is in his heart a muzzleloader hunter, as I am. It is YOUR safari, and not a trip on which the PH is entitled to tell the client which rifle he should use so as to score more points in some competition to see whose clients gets the biggest and best trophies.

This is just my humble opinion.

Enjoy your safari!