Effective range is all in the hands of the shooter. I have been on a couple hunts for big critters where I practiced hard for 30yds, and was ready and good enough to make the 30 yd shot if that was all I though I was going to get. I have never taken it, as it was never presented, and know in my heart (for me) I would be looking to get closer, probably to the point where a shot was no longer there.
I have seen guys that I would never question taking a 30yd shot on a critter, and I have seen others that I believe do not have the skill to hunt way up close!
Every individual has to be honest with himself when making those decisions, and act accordingly!
Bisch