How much elevation is necessary to get a 123 SST to 1000 yards?

[molar]

Assuming a 123 gr SST with a MV of 2550 fps, how much elevation is necessary for 1000 yards?

I have 42 MOA of elevation adjustment in the scope and a 20 MOA base, so this should give me 40 MOA total elevation adjustment, correct? Will this be enough for 1000 yards?

[KentuckyBuddha]

Absolutely.


IIRC the time LRRPF52 shot his 16" at 1000(and farther), in albeit very favorable conditions, had only doped for 49.5 MOA. You should certainly have a fair amount of wiggle room there I reckon.

[Sniper338]

It all depends on your conditions and elevation.... some guys here are shooting to 1000 or more with 123gr bullets, other like me at close to sea level start seeing goofy bullet stuff at about 900..... where as if i climb up the mountain my bullet would go much further before it goes wacky...

[lrgrendel]

Assuming a 123 gr SST with a MV of 2550 fps, how much elevation is necessary for 1000 yards?

I have 42 MOA of elevation adjustment in the scope and a 20 MOA base, so this should give me 40 MOA total elevation adjustment, correct? Will this be enough for 1000 yards?

Plus all your info into JBM BALLISTICS and hit enter. It will give you a solution.
I shoot 123 AMAX at 1000 and do just OK at sea level. Of course your velocity is critical. I found my CHRONO said my amax's were going 2640 FPS when actually it was closer to 2600. For me JBM works really well and is bang on almost all of the time at the various distances.

Hope this helps.

[CPT.CRAZY]

Using the data at my altitude with my rifle at 2565 fps. I need 40 MOA at 1000.

[PredatorDown]

I dialed 39 to get there a few weeks ago at around 6500ft elevation and 2490fps.

[molar]

Plus all your info into JBM BALLISTICS and hit enter. It will give you a solution.
I shoot 123 AMAX at 1000 and do just OK at sea level. Of course your velocity is critical. I found my CHRONO said my amax's were going 2640 FPS when actually it was closer to 2600. For me JBM works really well and is bang on almost all of the time at the various distances.

Hope this helps.

Their calculator says 29.1 MOA at my elevation. Not sure if I believe that

[KentuckyBuddha]

Their calculator says 29.1 MOA at my elevation. Not sure if I believe that

For goodness sake, be careful of what is behind your targets. You don't want to accidentally hit any Sherpas or climbers you might not have had your head on a swivel looking for. : )

[LRRPF52]

You need to know the barometric pressure most importantly for the actual conditions you are shooting in. That will be a huge variable, more so than temperature even.

I have shot the 123gr A-MAX out to 1200yds with 14.4 Mils of elevation, but I was at 4400ft above sea level, in 80 degrees temp. There has been some second-guessing on the actual BC of the 123gr SST. Once we start getting beyond 600yds, it's better if we know the G7 drag modeling for that bullet. I'm not sure if we have settled on one yet for the 123gr SST.

[Joseph5]

If I am not mistaken I was getting to 1000 yards with 30 or 31MOA of elevation at 4500 feet above sea level and about 65 degrees temp. That was with a 123gr SST or AMAX at a little over 2600 fps.

[molar]

Are the specs for total elevation adjustment from the manufacturer just an estimate? My scope is listed as having 42 MOA elevation, but I counted 240 clicks at 1/4" per click, or about 60 MOA.

[NugginFutz]

Are the specs for total elevation adjustment from the manufacturer just an estimate? My scope is listed as having 42 MOA elevation, but I counted 240 clicks at 1/4" per click, or about 60 MOA.

Not knowing what your scope make / model is, it's difficult to say with certainty, but most scopes are close to the manufacture's listed elevation and windage ranges. I did, however, experience a scope which allowed me to dial significantly past the advertised max elevation. Was I really getting that elevation? Not at all. There was no hard stop on the scope turret to prevent over adjusting - the erector spring ran out of extension, and the reticle stopped moving shortly after the listed max. I realized then why the scope (a Millet) was so "reasonably priced".

[molar]

Not knowing what your scope make / model is, it's difficult to say with certainty, but most scopes are close to the manufacture's listed elevation and windage ranges. I did, however, experience a scope which allowed me to dial significantly past the advertised max elevation. Was I really getting that elevation? Not at all. There was no hard stop on the scope turret to prevent over adjusting - the erector spring ran out of extension, and the reticle stopped moving shortly after the listed max. I realized then why the scope (a Millet) was so "reasonably priced".

For now, I moved a Weaver Super Slam 3-15x50 over to it. I'll probably end up with a Nightforce NSX

[Nukes]

...I'm not sure if we have settled on one yet for the 123gr SST.

In his new book Ballistic Performance of Rifle Bullets, Litz lists the Hornady .264 caliber 123 grain SST BT G7 BCs as:
>3000fps 0.249
3000-2500fps 0.244
2500-2000fps 0.235
2000-1500fps 0.229
<1500fps 0.228

Just an observation, the Hornady website offers a G1 BC average of 0.510, while Litz offers a G1 BC average of 0.461.

[rubiconbay]

No that sounds low. I was using Hornady AMAx 123 gr with 2580 fps and dialed in 39 moa at sea level 70 deg and hit 1100 target.