[Blood of Tyrants]

The 6.5 G comes in at about 25 cartridges per pound. 5.56 x 45 M855 comes in at at about 50 per pound.

[Elderberry]

The 6.5 G comes in at about 25 cartridges per pound. 5.56 x 45 M855 comes in at at about 50 per pound.

I agree on the 25 per lb for the Grendel, but I figured around 37 per pound for the M855. (at least using the data from this site:http://www.thefirearmblog.com/blog/2016/04/09/how-much-does-your-ammunition-weigh/