I can tell you from a lot of experience shooting those animals your 7mm rem mag is good on those. But everybody needs a new toy. I love my 300 wsm
and it is a good choice. H-414 is my best powder with the lighter bullets and magpro does well with the heavy ones. The beauty of the 300 wsm is that it does very well in short, light hunting rifles making it an excellent choice where a short barrel light gun is called for.