Thanks for the reply twobob. Yes a light and handy double is exactly what I was after and I agree with your choice of calibres...with the right bullets those will really punch above their weight, "make their eyes water" as my great Uncle used to enjoy saying. If the .303 gets the go ahead it'll be using 215gr softs exclusively.

I must say I rushed through Ellis book, I was so intent on reading the whole thing through and getting to the next chapter I may well have missed a few points, I found it enthralling. I'll have another look and find those calculations.

Thanks again, and please keep us posted on the conversion of your "Belgian". Cheers for now.