by guideadmin » Tue Apr 20, 2010 8:15 pm
Mburu,
People are probably telling you to load heavier bullets for a number of reasons. Most like it is because the first fundamental in hunting bigger and heavier game is to use a bigger bullet. A heavier bullet when fired from the same cartidgetypically carries more momentum than a lighter bullet , so it actually hits harder evven if it has less energy. Another reason could be an observed understanding of how Energy Saturation affects bullet expansion. This has it's roots from when virtually every bullet was made of lead or had a lead core. Lots of energy in to small of a bullet would make it pop on impact.
So regarding your question about your 30-06. A larger or heavier bullet will probably loose energy but will continue to gain momentum. And Momentum is the true knock down power of a bullet. Energy is the ability to tear apart tissue, not the true impact. Use the quick reference graphs in the GUIDE to chart your energy and momentum at the given velocities for each bullet weight. Also, as you use a bigger bullet your energy saturation will go down so your bullet will hold together better. This will enable you to break more bone and structure and achieve a continuous wound channel. So, no you do not neccessarily "need" to upgrade but you could if you wanted to. A 300 Win Mag or a 338 caliber cartridge will defeinetly give you the ability to shoot a bigger bullet at a faster velocity. But your question is why use a bigger bullet. The answer is at ranges under 150 yards, it will simply do a better job on bigger animals.