I' ve used them (150gr Win Bal. Silvertips) on deer for years, my .30-06 throws them out at .5MOA off a harris bipod. I took a deer at 383yrds with one shot, it took one step and fell. BUT, I also killed a deer at 40 yrds that made it four miles before dying. If you hit the shoulder at close ranges, they' re going down dead before they know they are hit, everytime I' ve aimed for the shoulder at close ranges I get frags in the heart and lungs, with a broken shoulder, if I hit the rib cage though, they run just like the above mentioned.

OR are you talking about Super-X silvertips? They aren' t nearly as accurate as the Supreme Balistic SIlvertips (1.0MOA average, .80MOA was best), but they are more than adequate for hunting applications. I took two neck shots with them at close ranges this year, they dropped like stones. They give much slower expansion, I don' t like them in the shoulder as much as my Bal. Silvertips (shoulder is my favorite shot, even if you miss the heart/lungs they aren' t going very far very fast with one leg hanging limp.) but they do very well on straight forward vital shots. They are a real deer round, they give a little more expansion than a soft point, but not as much as my Bal. Silvertips which are slightly less volitile than varminter bullets.

My advice in either case is go for it, they are both great rounds and I' ve used both to great success (Super-X 150gr silvertips took me two does this year that dressed around 180# each!)