600 yard steel shooting with 5.56 - 12/23/2017 - 600yd moving targets w/ video
9/22/16 All of the pics are gone due to a photobucket problem a few weeks ago. But new pics are in post #209
I'd like to personally thank Noodles' bundle of pessimism for giving me the motivation to make this possible.
Post #54 has my build progress so far. Much of this OP is irrelevant now but lots of good info from SMEs and pros in the responses.
I've got a lower begging for an SPR build. I would like to shoot 4" steel hangers at 600 yards with it. I previously had a Noveske upper in 300BLK that was a tack driver and great for hunting but that round will not reach 600 yards.
Questions:
What barrel length should I go for? This will be shot suppressed. I am fairly set on 18" as it will provide a boost in velocity without being too long, but I will consider 16" or 20" if someone can provide quantitative and qualitative reasons for doing so.
On that note, what upper should I buy? I'm really liking the BCM 18" with KMR-A 15" price point. It's like $800 delivered with a rail panel for my Atlas.
What load (I reload) or factory ammo should I be shooting to do what I'm trying to do? I have no experience with precision 5.56mm.
My lower has a carbine RE. I'd prefer not to remove it and get an A5 but I will if necessary. Can a carbine RE work with an 18" barrel? What buffer would I need?
I have an 2-8x Vortex already mounted in a Bobro from a previous build. I've shot to 600 yards fairly well with a 4x ACOG but never at 4" hangers. I plan on upgrading the scope eventually as I know it isn't ideal, but will the 8x be a waste of my time or can I get away with it for now? $1000 for an upper is a lot easier to swallow than $2500 for an optic and upper.
600 yard steel shooting with 5.56 - Advice needed
Quote:
Originally Posted by
Eurodriver
I make sub MOA shots 600 yards consistently firing off a bipod with a rear bag out of my Krieger Barreled Rem700 in .308. There should be a pic/thread still up in the precision bolt gun forum of me doing so at 500.
World of difference between 150+ gr 762 and ~77 gr 556 at distance.
Statistically, the 762 hit percentage, (180gr) with 5% wind uncertainty at 600 yards, on an IPSC target, can be as low as 70%. Contrast this with 300 WM (230gr) same set of assumptions, is 94%.
556 will be even lower. So, it all depends on how well you can read the wind.
How much lower will depend on bullet choice and MV, assuming you've accounted for the other variables.
Not questioning your ability or trying to talk you out of trying. I'd actually like to see video once you're done.
I'd probably go for 20" to squeeze every last drop of MV as possible. I'm not a good enough wind reader to attempt it, but it would be fun to try.