Hello Everyone, First thank you all for all the great information that is being offered here. I have learned a lot and continue to learn more every time I visit this forum. I do have some experience in using a 12 bore paradox (my grandpas) some English make but pretty darn powerful. He used to hunt Royal Bengal tigers back in the day in India with it. Of late i have been fascinated to own a double. I wish to go to Africa in the next couple of years and as such in a quest for a good double. My sights are on a Heym 470 but of late I see lot of good reviews/feedback from experienced hunters on the 450/400 cartidge. I'm a novice at best so to say on calibers and difficult to understand all the nuances. I also plan to use the rifle for some fun trips in the US. Please help me decide.