11-25-2019, 01:03 PM
Flight Medic Wrote:Yeah, it was weird. I could ping the 500 target like three times in a row (granted, it was swinging so I was hitting outer edges), but at 600 I got lost. On a box of 20 rounds I only found the target 3 times ( I thought I only hit twice but my spotter said that I did it a 3rd time. I didn't see it, though). Rifle was an Armalite AR-31 .308 with a Nightforce NXS 5.5-22x56 shooting Sako Super Hammerhead 150gr.
I made the turret changes (per the ballistic app) like I had for 300, 400 and 500, all with good success, but 600 was ellusive for some reason. I have no doubt I'm the weakest link in the "system", my 55-year-old eyes arent what they used to be. Although, in my defense, the wind was whipping pretty good that day...I remember wishing I had brought a jacket with me.
All the targets, I believe, were 4 MOA-size, AR500 steel. The range where I shoot ( Triple C in Cresson, TX) have multiple lanes which have targets ranging from 6-8 MOA down to 2 MOA size, and there?s a target every 100 yards on every lane.
Im going back on Monday to sight-in the Grendel and see how far I can take it out. Will post results afterward.
FM:
Funny you would observe the difference between 500 and 600 shooting the .308. During the era when the .308 was king in High Power, it was kind of a saying that the difference between 500 and 600 was a couple of X's and points. That's why the .308 died out in High Power and guys went to the 6.5mm cartridges like the 6.5 / 08, .260, and eventually the 6.5 Creedmoor. Significantly better exterior ballistics with about 1/3 the recoil. Combine them and you have a round that is better in the wind and is not as abusive to shoot which equates to better performance at longer distances. The PRC guys soon abandoned the .308 for the same reasons and went to their 6.5 PRC cartridge.
If the winds are calm, the Grendel should do real well to 500 yards but it will lose its edge real fast past 500 due to its low velocity. Most likely vertical stringing and even the slightest wind will cause problems.
LR55