PDA

View Full Version : Matech for a .22 AR, calculations.


nrakid88
08-29-2011, 2:04 AM
Matech for .22? This is minus my calculations and tables. But should be close. Your welcome to anyone interested. Apparently if I zero my .22lr ar at 100, with a matech, I can be close to zero at 200 yards with the 600 yard setting. Not much range. I might stick with my MBUS.

Matech calibrations. 55gr m193 14.5’’ 3000fps .243 bc 200 yard zero
10mph wind

matech drop for moa
100- no setting
200- 0 moa
300- 2.9moa
400- 6.8moa
500- 11.3moa
600- 17.8moa

( i think, since there are inbetween around 450, 550, 650? on the matech each click is 3 moa elevation)


.22lr trajectory
Cci mini mag 40 gr 1245 fps, bc .138, 100 yard zero 10 mph wind


50 yard zero
100 – 5.6 moa drop
200- 21moa



100 zero drop
200- 15.1 moa drop
300- 36moa drop

donw
08-29-2011, 12:22 PM
are you talking about the standard A2 sights on an M4 based carbine? I'm not familiar with matech...

standard M4 (A2) sights have a 'mechanical' zero out to 300 yds. they are pretty well "dead on" accurate with the .22lr of my ST-22 when shooting all .22lr rounds i use within 50-75 yards.

G-forceJunkie
08-29-2011, 6:16 PM
I can be close to zero at 200 yards with the 600 yard setting. Not much range.

Its a .22 LR with iron sites, you need more than 200 yards? I shoot tactical bolt action .22 matches out to 200 yards, as well as a 200 yard prone match with a scoped .22lr. 200 yards with a .22lr is like 800 yards with a .308 in terms of drop and effects of wind. I think your barking up the wrong tree (or a tree that doesnt exist) if you are trying to shoot a .22lr with iron sites beyond 200 yards. But thanks for the info, I was just thinking the other day how that site would regulate on my new Tac Sol .22 upper.

nrakid88
08-29-2011, 7:55 PM
I just thought the info might help someone. I excluded the math because the tables wouldn't copy over.

I was actually out today and shooting at 400 yards with my .22 and a 4 power scope.Slightest wind difference meant I was left, right, high, or low... of my target. Tagged it a few times though

G-forceJunkie
08-29-2011, 9:13 PM
You can lob them in at that range, but that just straight up lobing them in, mortar style :) I'd have to check my dope, but with a typical 50 yard zero your looking at about a 30 foot holdover. A couple MPH wind is going to move it several feed as well. I would like to see if you could do the math for that site with a 25 yard zero. Should give you a real usable, adjustable iron site for iron site appropriate ranges with a .22lr

PS: Arnt those sites graduated in meters?

G-forceJunkie
08-29-2011, 9:23 PM
Ok, got off my *** and pulled out my dope card. With the Wolf Match i shoot (40 gr, 1050 fps) and a 50 yard zero, it would look like this:


200- 50 yd zero
300- 75 yard
400- 102 yds
500- 130 yds
600- 170 yds

nrakid88
08-29-2011, 9:41 PM
Thank you for helping out G force.

I am just thinking that for my uses, hunting and plinking, my MBUS withh 50 and 100 yard zero's is just fine. I can hold over for longer shots (which honestly I probably wouldn't take since I can't see small critters that far)

Does seem that the MatTech would make a handy 50-170 yard sight. I might throw it on my 22 if I get a LMT rear for my 5.56

nrakid88
08-31-2011, 1:23 PM
Wow. For a 25 yard zero this gets cooler!

200 setting- 0 Yards, 1.5" high

200 setting- 25 yards, zero

200 setting- 50 yards, zero

300 setting- 75 yards, maybe 1/4 inch high

400 setting- 100 yards, 1.2 inches high

450 setting- 125 yards, .25 inches low

500 setting- 150 yards, 2.2 inches low

550 setting- 175 yards, 4.25 inches low

600 setting- 200 yards, 8 inches low


Thats seriously not too bad. I mean, in a semi auto, shooting varmints, you can go from 25 yards to 200 in a snap. Plus, you won't know if your varmint is at 200 or 175, so your guesstimate of range, and your semi-close calibrated irons will get you close, and you can see the dirt splash to compensate for your next round.

I think my matech has found a new home!!!!

nrakid88
08-31-2011, 1:30 PM
Range Velocity Impact Drop ToF Energy Drift
0 1280 -1.5 0 0 131 0
25 1185 0 0.82 0.06 112 0.84
50 1112 -0.04 3.19 0.13 99 2
75 1054 -1.85 7.32 0.2 89 3.82
100 1007 -5.62 13.41 0.27 81 6.25
125 968 -11.54 21.65 0.35 75 9.21
150 935 -19.77 32.21 0.43 70 12.67
175 905 -30.5 45.26 0.51 65 16.58
200 878 -43.87 60.95 0.59 62 20.93

this chart is for a Remington gold bullet, 1260 fps, .123 BC, 10 mph cross wind