30-30 has probably taken more black bears than any other
  cartridge out there.... plenty enough power.  Son took a 250
  Lb black bear  last month  on my handloaded hornady 170 grn
  bullets.    one shot  at 60 yards  I know cause the little thief
  snuck my range finder outta my fanny pack the morning we
  went hunting.   Bear went  not quite twenty yards and dropped.
       Anyone who says it won't is reading to many magazine articles,
  and not getting into the bush.  and finding out for him/her self the
  practical truth of the matter.   they are reading a mag that is funded
 by that particular manufacturer.    30-06, .308,  7mm,  300 mag,  .243
 they are all great guns.  the 30-30 has been around long enough that
 I guess it doesn't have to be written about in outdoor life, field n stream
 or any other mags,  It's performance over the past 110 years SPEAKS
 FOR ITSELF !!!
  Enjoy Your hunt!!!