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Jpanzer

Burris AR-332 Prism Sight on a AK 74?

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Just read about this scope, and I like the fact that the Burris AR-332 Prism Sight provides 3x magnification AND red dot capability in one package. The question is would a scope calibrated for the 5.56 round be useful on a 5.45x39 AK 74? Are the trajectories of the rounds close enough where the Burris is a good alternative to the POSP?

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After a little google fu:

 

Data from the same article, for Russian military 5.45x39 Type PS 53gr FMJBT ammo (fired from AK74):

 

____________________________ RANGE (yds) _____________

------------------ 000 --- 100 --- 200 --- 300 --- 400 --- 500

VELOCITY (fps) 2953 -- 2663 -- 2387 -- 2130 -- 1889 -- 1662

ENERGY (ft-lbs) 1026 --- 834 --- 671 --- 534 --- 420 --- 325

TRAJECTORY (in) 0.0 ---- 2.1 --- 9.2 --- 22.4 -- 43.2 -- 74.1

 

and......

 

Approximate M193 55gr trajectory:

 

---000-----100-----200-----300-----400-----500---

---(-3)----(+4)---(+5.5)----(-.5)---(-14.5)---(???)

 

 

No promise that this info is correct, but they seem to have substantially different trajectories. On a side note, it seems that the .556 was zeroed at 300 yard and at is strange that the 5.45 was never close to zero. Something seems fishy about that 5.45 data. I know next to nothing about bullet drop, so perhaps someone else will chime in.

Edited by bigj480

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I would imaging that bullet drop charts are calibrated by zeroing at 0 yards so that you're consistent across calibers or something...

 

Acer

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heres my take on the comparison, though i dont garantee any accuracy, as this is just the load data i had already loaded, and i didnt verify it today, just though id make a graph and see if it helped you with your question.

 

first one is zeroed at 200m, second is an absolute zero, showing the actual total drop from the muzzle.

 

Should be somewhat close to reality.

post-3313-1252035432_thumb.jpg

post-3313-1252035440_thumb.jpg

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According to those charts, it looks like it's damn close out to 250 and close enough for combat accuracy for a good ways after that. Get the sight and let us know how it works. The Russians don't make a sight calibrated for 5.45 bullet drop, do they?

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According to those charts, it looks like it's damn close out to 250 and close enough for combat accuracy for a good ways after that. Get the sight and let us know how it works. The Russians don't make a sight calibrated for 5.45 bullet drop, do they?

 

That I don't know for sure.

 

I've now got a couple of leads on some Comblock sights, specifically the PO 3.5x21 and the commercial version of the 1P29 the UPO-2-1. These two I do believe are calibrated for the 5.45x39 round.

 

You know, it would be a lot simpler if I could actually see and handle these things... :rolleyes:

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