"doing it near as well" is subjective...the 260, Creedmoor, or 284 may be less accurate in a lightweight rifle due to anticipated recoil (shooter dependent). The difference in muzzle velocity from a 260 and my 20" Grendel was between 50-150 fps for a 129 grain IB (powder choice dependent). That's only 98" drift vs 106" drift at 1000 yds (roughly 7% difference for 150 fps delta). That's with roughly 40 grains of powder for 260 and 31 grains for the Grendel.
Which is more efficient?
For comparison, a 168 grain IB .308 has 118" of drift at 1000 yds.
The difference between 6.5 Creedmoor and Grendel is even less (and I'm using load data for a 24" barrel for the 260 and Creedmoor). If I projected a 24" barrel for the Grendel, then the difference is almost nil.
My bolt Grendel did just fine at Boomer Shoot this year (and was much more pleasant to shoot during an all day event).
Which is more efficient?
For comparison, a 168 grain IB .308 has 118" of drift at 1000 yds.
The difference between 6.5 Creedmoor and Grendel is even less (and I'm using load data for a 24" barrel for the 260 and Creedmoor). If I projected a 24" barrel for the Grendel, then the difference is almost nil.
My bolt Grendel did just fine at Boomer Shoot this year (and was much more pleasant to shoot during an all day event).
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