My Win mod70 .270 has killed 15 black bears from 100 lbs to over 400 lbs with Federal Premium or Classic in 130 or 140 grains. Distances varied from 30 yds to over 300 yds. It is all about shot placement.
my .303 always works for bears and ya i say the exact same things as all these guys use a bigger cal for bear just so they dont have to suffer its always best for one shot one kill with big game and im sure you all know that.
What does "gauge" mean anyway? As used here gauge means the number of round lead balls the same diameter as the inside of the barrel (aka the bore) that it would take to weigh one pound. It takes 12 lead balls the same diameter as a 12 gauge barrel to weigh a pound. The smaller 20 gauge would require 20 balls of that barrel diameter. The larger bore 12 gauge would require 12 lead balls of the bore diameter to weigh one pound.
In general the number of pellets in a shotgun shell...