You don't even need a precise measurement device to know that Corelockts are not well made. If you can't see that and think they are better then Sierra,Hornady,Nosler or Speer get better glasses or take up Golf. When they first came out they were a great bullet and over time the beancounters cheapened it by making the jacket thinner. They now have the Ultra version which probably performs like the original version and retains a little more weight but they subsequently charge more for it. Much More. I have had reasonable success with them at the range but I am betting my 700 would like to be the other brands I mentioned. I still wouldn't trust them on anything bigger then a Deer.