Have a friend new to bow hunting and he asked me about what arrows he should buy which in turn got me thinking about the arrows I use and why? When I first started hunting I used the arrows that came with the Bow-tech I bought used off Craigslist. They were Gold Tip somethings maybe 7.4 gpi and standard diameter. I shot a Texas Hill country doe so basically a big dog using a Toxic 100 grain broad head and shooting 70 lbs. I was surprised that I didn't get much penetration(got in to the second lung) so I started looking for a new arrow. I found the small diameter carbon express pile driver pass through extreme at 10.7 gpi. I have had great success with these small diameter and heavy arrows and was just curious what everyone else thought.