Factory silvertips?? ive also had bad experience with well hit Stags, a fleshwound , the blood dried up an the deer ran off an possibly died few days later..
stay away from anythin designed for deer!
I've seen elk, moose, deer, and bears all harvested by 150gr. factory Dominion/Imperial SP's. the gentleman in question did all that with an anceint old 742 Woodmaster, in 308Win. and a Lyman peep sight, he simply said the 180's didn't shoot worth a darn in his rifle, so he used 150's because they did shoot. He also picked his shots, and had patience beyond compare.
Hitting what you aim is paramount and your first and biggest hurdle. Guchi uber super tough bullets are about as far down my need to have list in cartridges like a 308Win, because your impact velocities are rarely much over 2700fps.
Once you get over the 2700fps impact threshold conventional cup/core bullets may do some strange things with regard to terminal ballistics. Once you cross the 2900fps impact threshold it's almost a given that cup/cores will have a large failure rate.
SilverTips, PP's, SP's, Core Locts, in bullet weights of 165gr. or heavier will with out question do the job, if they shoot well in
your rifle, and
you are equal to the test.
Pay attention to the words I've highlighted in bold..they are what matter here.