Hornady Team Discusses 6mm ARC

[lazyengineer]

Here is a comparison between 6mm ARC(Hornady 105gr BTHP) and 308Win(Sierra 175gr TMK) that I did in QuickTarget. The bottom 2 lines are the ft/lbs and they reference to the scale on the right and the top 2 lines are velocity and they reference to the scale on the left. The bottom scale is range which is 1500yds max.

This graph is at 200m elevation(Ukraine), 70 degrees temp and give about a 200ft/lbs difference at 950yds. I also used 110 deg and the 308 increased to 236ft/lb spread. I then tried 20 degrees temp and the lines came within 140 ft/lbs.

These calculations are from QuickTarget and therefore I do not know how accurate they are. Just thought it would be interesting to see on a graph.



Purple line = 6mm ARC velocity - 2600fps starting velocity
Red line = 308Win velocity - 2500fps starting velocity

Blue line = 308Win ft/lbs
Light blue line = 6mm ARC ft/lbs

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That's interesting. Any chance you can throw in basic 6.5 Grendel Hornady 123 gr to compare?