Optimum 6.5 Grendel bullet weights

[stanc]

There is a reason a heavy copper alloy bullet was selected for the CQB mission. The sectional density and ruggedness of this bullet compared to other choices available tell us that penetration is a significant issue.

No doubt SOCOM had a reason for selecting the 70gr TSX over lighter weights. But, even if you're correct in assuming that sectional density was a factor, it doesn't necessarily follow that the same SD would be required to get the optimum terminal effects with a TSX in a larger caliber.

Even today, CQB frequently involves impromptu barriers, vehicles, buildings, etc.

Granted, but my position is that there is likely to be no significant difference in barrier penetration capability between 6.5mm TSX bullets of various weights, while it seems very likely to be a clear superiority in wound trauma with lighter TSXs, due to their higher impact velocity.

Advocates of the Grendel, or any other cartridge, must look beyond the current conflict. The one certain thing is that at least some of our adversaries will adopt body armor.

I submit that's a non-issue. If it's soft armor, TSX bullets of any weight will penetrate it easily. And if it's hard armor, no 6.5mm TSX bullets will penetrate it, regardless of sectional density.