Don't know if we are talking about the same bullet or not but a few years ago I used a 185 gr bullet made by nosler (the dealer was selling them loose,they looked just like a xtp bullet and said they were made by nosler)I shot these with a ruger 77/50,took 7 deer, all head shots from 20 to 75 yds,all dropped where they stood.Never shot them past 100 yds so don't know how they would do past that.Haven't used the ruger in several years,have an encore and 2 savages that I have been using last few years.Since then I have been sold on the shock waves and sst's 200 and 250 gr.