6mm Grendel Group Design Project

[LRRPF52]

Why the .243" and not a .257" ?

In the quest for MV and BC, what are we loosing in hunting capability? Are sectional densities equal in 6mm and 6.5mm?

I thought the 6.5 Grendel already provided the optimal balance between target shooting and hunting performance.

Good to see you again!

If we're limited to the AR15 magazine well dimensions, then .257" is really close to 6.5mm, suffers from a lot of the same challenges, but I'm a big fan of the .257 bore.

It has been neglected when it comes to bullet selection, but I really think is a great balancing point if we could get bullet manufacturers to support it.

I think this will actually happen moving forward, as Hornady has already done some work on the .257 Creedmoor. .257 Creedmoor was featured in a recent Handloader Magazine as well.

For competitive shooters in long range matches, most people want a .550 to .6 or higher G1, .275 to .3 + G7 bullet. That's easier to do in .257 and keep the recoil down than it is in 6.5mm (140gr + cup and core).

In a 6mm, that usually puts you in the 105gr + weight category.

It could be done in .257 with a 123gr - 130gr, but would be quite long for the AR15.