I don't like the way Winchester Silvertip's fragment. I had a friend have to hit a pronghorn at 200 yds. twice with a 30-30 Win. using 150 gr. Silvertips, and still have to finish it off due to lack of penetration.
There is a difference between Winchester Silvertips, and Winchester Ballistic Silvertips.
Spend a few extra dollars and purchase the 180 gr. Accubonds, or 168 gr. - 180 gr. Winchester Ballistic Silvertips.
Good luck.