Sighting an AR

drmitchgibson · Dec 16, 2011

I'll be sighting in my ARs BUIS tomorrow, and was wondering if there are any tips out there. I've been doing it with the handguard on a sandbag and by using the mag as a monopod so far, but feel like there may be something better. Does anyone use two sandbags, maybe with a short magazine or doing it single-shot? Or anything else that may be wildly successful?

Ksmirk · Dec 16, 2011

Front rest, rear bag, 20rd mag

A bi-pod and rear bag would also work, I use the 20rd mag since it's shorter and doesn't get in the way. Later,

Kirk

TroyF · Dec 16, 2011

Shoot prone, shot mag. Rifle bag under handguard, sand sock under buttstock. Left hand squeezes sock for elevation changes.......

Lance Jensen · Dec 16, 2011

I found I shoot better groups prone and not bagged... not sure why lol

TroyF · Dec 17, 2011

Cuz youre the FBI......

Or is it the BFI?

WillR · Dec 17, 2011

What distance would you zero the BUIS? Let's say that your primary sight is zeroed at 100. Would you want the BUIS zeroed closer say at 25 yards? Like if you were transitioning for fast acquisition close targets in 3 gun.

drmitchgibson · Dec 17, 2011

Yeah, 3-Gun is the only thing I use it for. I had been using a 30 yard zero which I did fair with while shooting on the 100-300 yard stages, but I'm not sure where the cross-over for it is. I'm using 55 gr Federal factory ammo, I think XM193.

Ksmirk · Dec 17, 2011

I just sight in at 50 yards and if I recall the other zero is like 250 yards, just aim a little low at 200 and a little high at 300 and IF you shoot the same loads you zero with it works out pretty good. Don't ask I had a serious DA moment at USSA

Later,

Kirk

TroyF · Dec 17, 2011

Just know your holdovers

Lance Jensen · Dec 17, 2011

I use a 50 yard zero... cross over is between 200 and 250 depending on the load. Just gotta put it on paper to know.

Ben-Sons · Dec 18, 2011

On the military side, the rule of thumb is your 25m zero should be on at 300.
Always Zero prone with sandbag or bi-pod.

drmitchgibson · Dec 18, 2011

I ended up using a nice wooden shooting rest someone left sitting on the long range at Action Pistol, where someone also conveniently left a target stand at 50 yards. Used bags front and back, lifted up with my ammo boxes to clear the 30 round mag. I zeroed in six 3-shot groups, and then shot the steel at 300 and 200 which rang every time. I'm happy with this.