10-27-2011, 12:34 AM
bwaites Wrote:There is a big difference between a competitive cartridge and one that will get to 1000 yards. At 1000, I had no misses, but 6's. 7's and 8's aren't competitive. Under ideal wind conditions, (meaning NO wind), you might be able to play the game with the Grendel, but in the wind, its a whole different ball game.
Most of the 155 grain .308 bullets run a BC of .450-.460 or so. The 107 Sierra/108 Scenar are also around .460, so they are in the same ballpark. The problem is running that Scenar at a comparable velocity out of an AR. From my 28" barrel, I've gone over 2800 FPS without pressure signs, (for whatever that is worth in a gas gun!) but 2950 is still a reach.
IF I had some of the powder Hornady is using with the 123's, I think I could get there, because the Hornady factory ammo is shooting very close to 2750 from my barrel. But it still might not work, if that powder isn't as efficient with lighter bullets as it is with the 123's.
NOW....the caveat would be a bolt gun. Running Lapua brass, I don't think that 3000 FPS is out of reach with the 107/108, and it might even get there with 123's. If I could shoot the 123 Scenars or Sierra MK's at 3000, then I think you could play in the game with the .308's.
BUT...from a gas gun, vs. a bolt gun....not a fair match for the Grendel.
Comparable doesn't necessarily mean equal!
I've shot the Grendel on windless days at a 1000 yds on paper and the gun has shot possibles with multiple xs. It's an accurate round that's for sure.