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Old 10-09-2017, 10:03 PM   #1
Bunker Hill
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Default Sighting M92 for 100-yard zero on a 25 yard range?

We have a new local indoor range that allows you to shoot whatever weapons you like, but the longest (rifle) Lane is only 75.

Does anyone have any idea where Id need to sight in a Zastava M92 SBR at 75 for it to hit dead center at 300?
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Old 10-09-2017, 10:32 PM   #2
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I pulled 678 meters per second for a 123gr FMJ from some notes I had on a YouTuber or maybe Krebs who did chrono testing w a M92. Plug that into the ballistic calculator you use or use the one at ballistic data.org I think. Set it for a 100yd zero and or play around w the numbers it yields w that velocity and load data. Good luck.
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Old 10-10-2017, 06:29 AM   #3
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The truth is that you can do math and plug numbers all day to maybe get kinda close, but each firearm will shoot a particular load how it's going to shoot it at the end of the day. Especially with 7.62x39. By the time you tracked down the BC for the projectile, actually chronographed it's true velocity average, and figured everything out; it'd be easier to just do some rough estimates and find a range somewhere else to bring 100 rds of whatever ammo, and be confident that your dope is on.
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Old 10-11-2017, 02:37 PM   #4
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Quote:
Originally Posted by Bakwa View Post
The truth is that you can do math and plug numbers all day to maybe get kinda close, but each firearm will shoot a particular load how it's going to shoot it at the end of the day. Especially with 7.62x39. By the time you tracked down the BC for the projectile, actually chronographed it's true velocity average, and figured everything out; it'd be easier to just do some rough estimates and find a range somewhere else to bring 100 rds of whatever ammo, and be confident that your dope is on.
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Old 10-11-2017, 04:52 PM   #5
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I was gonna sight my M92 in at 100 yards but only really have easy access to 25 yard indoor ranges.......so the conclusion I came to was: Sight in for POA / POI at 25 yards and if the theat is further out, charge them screaming like im in the movie Bravehart until I get about 25 yards away then shoot
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Old 10-11-2017, 08:00 PM   #6
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Originally Posted by Sublimeon24s View Post
I was gonna sight my M92 in at 100 yards but only really have easy access to 25 yard indoor ranges.......so the conclusion I came to was: Sight in for POA / POI at 25 yards and if the theat is further out, charge them screaming like im in the movie Bravehart until I get about 25 yards away then shoot
Solid advice.
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Old 10-11-2017, 08:13 PM   #7
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I calculate that point of impact should be 5.44 inches high. 123 grain with muzzle velocity at 2227 fps
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Old Yesterday, 07:59 PM   #8
gasouthsiderevolver
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If you have access to a place with a 25 and 50 yard area, zero at 25 first then zero it at 50. I zero all of my rifles at 50 yards and out to 200 it's dead on. My m92 hits steel at 200 yards on 10" plates all day and I was surprised it did as well. Your 100 yard zero will be dead on as well. I actually broke my steel gong this past weekend with so many hits on my plate. Crazy. But I was more than satisfied hitting nearly 100% at 100 with the Krink.
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Old Yesterday, 08:04 PM   #9
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Use a ballistic calculator.
Enter desired zero (300yds in this case)
Know BC, bullet weight, velocity.
Calculate. Check the graph.
There will be an initial zero at around 21-24yards. Which matches 100yd zero, basically the arch/path going up, then back down to zero again (On my mini draco it's 19 yards for 100yds zero)
Set your target at that distance. Zero it. Done.
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