05-11-2011, 11:05 PM
Tony Williams Wrote:...I am happy for a barrel length of 20 inches to be specified when making comparisons with the 7.62mm, since in reality guns being used at anything approaching 1,000 metres would probably have such a barrel...It seems reasonable to specify a 14.5 inch barrel when making comparisons with 5.56mm. That actually makes the use of both sets of comparisons quite sensible.We might be approaching the trajectory question a bit awkwardly.
A way of looking at this might be to ask that the rifle/carbine has a point blank range (based on the average size of the torso) that is equal to or better than the 5.56 and that the GPMG application has the direct 7.62 comparison.