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What distance do you zero at?


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I ran a series of ballistic models for my PSA AR-9 PCC using some of the more popular zero distances mentioned above.  I'm using 124 grain Montana Gold CMJs with 4.3 grains of CFE Pistol at 1.10 OAL.  This generates 1085 fps for a 134 PF.  My Eotech red dot sits 2.5-inches above the bore center-line.

 

Here are the results for a 10 yard zero:

Distance, yards Bullet speed, f/s Vert. correction, inch Hor. correction, inch
10.0 1078.4 0.00 0.0
20.0 1062.3 -2.20 0.2
30.0 1047.6 -4.09 0.3
40.0 1033.5 -5.67 0.6
50.0 1020.3 -6.93 0.9
60.0 1007.5 -7.83 1.3
70.0 995.7 -8.43 1.7
80.0 984.3 -8.66 2.2
90.0 973.4 -8.54 2.8
100.0 962.9 -8.03 3.4

 

For a 15 yard zero which is what I use:

Distance, yards Bullet speed, f/s Vert. correction, inch Hor. correction, inch
10.0 1078.4 0.75 0.0
20.0 1062.3 -0.67 0.2
30.0 1047.6 -1.81 0.3
40.0 1033.5 -2.64 0.6
50.0 1020.3 -3.11 0.9
60.0 1007.5 -3.27 1.3
70.0 995.7 -3.11 1.7
80.0 984.3 -2.60 2.2
90.0 973.4 -1.69 2.8
100.0 962.9 -0.43 3.4

 

18 yard zero:

Distance, yards Bullet speed, f/s Vert. correction, inch Hor. correction, inch
10.0 1078.4 0.98 0.0
20.0 1062.3 -0.24 0.2
30.0 1047.6 -1.10 0.3
40.0 1033.5 -1.69 0.6
50.0 1020.3 -1.97 0.9
60.0 1007.5 -1.89 1.3
70.0 995.7 -1.46 1.7
80.0 984.3 -0.71 2.2
90.0 973.4 0.39 2.8
100.0 962.9 1.89 3.4

 

20 yard zero:

Distance, yards Bullet speed, f/s Vert. correction, inch Hor. correction, inch
10.0 1078.4 1.10 0.0
20.0 1062.3 0.00 0.2
30.0 1047.6 -0.79 0.3
40.0 1033.5 -1.26 0.6
50.0 1020.3 -1.42 0.9
60.0 1007.5 -1.22 1.3
70.0 995.7 -0.71 1.7
80.0 984.3 0.16 2.2
90.0 973.4 1.38 2.8
100.0 962.9 2.99 3.4

 

25 yard zero:

Distance, yards Bullet speed, f/s Vert. correction, inch Hor. correction, inch
10.0 1078.4 1.26 0.0
20.0 1062.3 0.35 0.2
30.0 1047.6 -0.28 0.3
40.0 1033.5 -0.59 0.6
50.0 1020.3 -0.55 0.9
60.0 1007.5 -0.20 1.3
70.0 995.7 0.51 1.7
80.0 984.3 1.54 2.2
90.0 973.4 2.95 2.8
100.0 962.9 4.72 3.4

 

I prefer the 15 yard zero because out to about 7 yards I can set the dot at a half inch below the top of a Metric target head and hit the upper A zone near the center.  At 10 to 20 yards I just aim at the center of the upper A zone if a head shot is required.  I seldom encounter targets beyond 30 yards in a USPSA match but when I do they're inevitably open targets and I just aim at the center of the body.

 

Edited by XD Niner
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  • 1 month later...

Know the local club typical average ranges for PCC that you shoot at, then zero accordingly.

If you are also shooting at 3g matches that will be different than a standard USPSA match -adjust out to 100 or so and know the dope, if needed. 

I would say zero for the ranges you are most likely to be shooting at most of the time. 

 

 

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