I've been helping my dad locate a new "brush" gun for walking the property. He is leaning towards a merkel SR1 in 8x57mm. Its the newer "js" round that is creeping on 3,000 fps.. When he asked me what the difference was between that round and the 30-06, all I could say was that the 8x57 was a lil shorter...lol So here I am. Asking you (Europeans especially) what is the difference????