Good pictures and thanks for that. Following the 'suggestions' of my son in law and info and recommendations of a couple of people on HBC, I'm in the process of changeover from standbys like Sierra Gamekings to Barnes. In a recently acquired 7x61 S&H and to start testing, I'm planning on going with the 140gr TTSX and/or the 140gr MRX. Next on the list is my '06 and there I'm thinking of 150gr TTSX and/or MRX. Then, in the 308NM, I'm looking at the 168gr TTSX and or the 165gr MRX. Question, inline with your pictures, I've checked the Barnes site and I can't clearly see exactly what the main difference in construction is between the TTSX and the MRX.

Do you have pictures of or a clear description of the difference, for someone trying to catch up with technology??