The shooting set-up will be described in detail below. fliers, target movement, Butterfly Shots). There was absolutely no use of any Group Reduction Techniques (e.g. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. An accuracy (technically, precision) evaluation of the first-run MK262 Mod 1 ammunition was performed following my usual protocol. The specification for accuracy testing of MK262 calls for multiple 10-shot groups to be fired which is exactly what I like to do for a range report. (The squares of the red grid measure 1/10 of an inch.) The 77 grain MK262 Mod 1 projectile compared to the M193 projectile. The round is charged with a proprietary ball powder. MK262 Mod 1 is loaded in WCC 5.56mm brass and uses a cannelured version of the 77 grain Sierra MatchKing. It is the first-run version of MK262 Mod 1 that I tested for this report. For years, MK262 was only available to the civilian population as “seconds,” but more recently Black Hills has made first-run production lots available on the commercial market. Since its inception, genuine MK262 has been manufactured solely by Black Hills Ammunition. The 77 grain MK262 ammunition produced by Black Hills Ammunition has been referred to as the most accurate mass-produced 5.56mm ammunition that has ever been type-classified and issued by the US Army. I have some I have been meaning to test along with some Black Hills, I'll have to take them all to the range soon.I thought about Black Hills, but their Mk262 and 75gr blue box ammo hasn't impressed me at all. I thought you were trying to be coy about the Aussie ammo. Once the weather breaks and my 16' LT PredatOBR arrives, I plan to test accuracy/chrono them all. I have purchased a fair bit of IMR 8208 XBR and have some loads to test along with Varget, Reloader 15 and Vihtavuori N135 all using the same brass, primer and Sierra 69 BTHP. Yes, it was indeed 'Australian Outback Ammo' Sorry about the incorrect name Varget is a good bet to try with any heavy bullet (69 &up) I've loaded IMR4895 with those same components and the accuracy was there, but slightly lower velocity and showed pressure signs sooner. A couple of my shooting buds have loads that are very close one using IMR 4895 and the other using Varget. It will consistently shoot 1/2 MOA out to 300+ if I do my part. My batch of that powder is quite old but still great so I don't think the charge level would be helpful as they have changed the powder from what I heard. That load uses AA2495BR powder and Rem 71/2 primer. What 'Aussie' brand ammo? I assume you mean Australian Outback Ammo, I have some of that but haven't shot it yet, I'll have to do that and compare to my ladder of 69g ammo I recently loaded with four different powders. It's velocity was 2601 with an SD of 11 and an ES of 34 and the accuracy was good, but not quite equal to my load.Ĭare to share that load? That is a really low SD. I recently chrongraphed some 'Aussie' brand factory match ammo which is loaded with the 69 SMK bullet out of the same rifle. My most accurate load for long range (300+yds) in my 16' 1 in 9' barrel using the 69 SMK chronos 2580 with an SD of 5 and an ES of 10.

Gorilla ammo 69 grain powder