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Stephen7942

PCC zero - What Yard Zero?

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I wanted a brighter sharper optic on my 9mm Colt. So took an Aimpoint off a back up 16 inch .223 and tried it on a 9mm.

Without any changes it worked fine for the pistol distances.  Later on I bought a dedicated Aimpoint for the 9 and used the same distance.

I would guess that knowing your holdovers and unders is more important than the actual PCC zero.

 

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Ok. After extended testing this afternoon. with 2 JP's both with Holosun 510's

 

15 yards (meters since we are Europan) zero, dead on hole in hole.

 

All between 10 and 20 yards... Point of aim is good to go, all All differences neglectible.

 

Changes are:

 

25 meters / yards : 4 cm = under 2 inch higher...

 

35 meters / yards: 10 cm = 4 inch higher...

 

45 meters / yards: 15 cm = 6 inch higher!!!

 

 

identical if going down..

 

10 meters /yards: 2 inch lower

 

5 meters/yards: 3 inch lower

 

1 meter... 15cm / 6 inch lower... 

 

So I like 15 yards zero. Aim at center of IPSC target at 25-40 yard for perfect A

 

And aim bit higher for everything pretty close. 15 yard zero it is fine for me..

 

BR

Edited by Fasthenk65

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1 hour ago, Fasthenk65 said:

 

 

1 meter... 15cm / 6 inch lower... 

 

 

How high is your sight over your barrel?

This doesn't really sound correct.

 

 

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5 hours ago, Fasthenk65 said:

15 yards (meters since we are Europan) zero, dead on hole in hole.

Changes are:

25 meters / yards : 4 cm = under 2 inch higher...

35 meters / yards: 10 cm = 4 inch higher...

45 meters / yards: 15 cm = 6 inch higher!!!

identical if going down..

10 meters /yards: 2 inch lower

5 meters/yards: 3 inch lower

1 meter... 15cm / 6 inch lower... 

So I like 15 yards zero. Aim at center of IPSC target at 25-40 yard for perfect A

And aim bit higher for everything pretty close. 15 yard zero it is fine for me..

 

BR

Your calculations seem to be way off.  No way you are going to be 6 inches off at 1 meter.  Closer to 2 inches.

5 meters should be close to 1.7 and 10 meters close to .8 inches.

Edited by BartCarter
typo

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16 hours ago, BartCarter said:

Your calculations seem to be way off.  No way you are going to be 6 inches off at 1 meter.  Closer to 2 inches.

5 meters should be close to 1.7 and 10 meters close to .8 inches.

This is what we measured with this load (115 gr plated , 3,35 gn N350, Frontier 115gn bullets) with 2 JP's, one 14,5 barrel (mine) one 16" barrel...

 

So????

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The largest spread between sight and bore on any of my rifles is about 3"

At 1 meter, the max possible drop would be this 3"

 

If you have a 6" drop at 1 meter, that would mean the center of your optic is about 15cm above the center of the barrel.

 

So unless you have a huge riser on your optic and a chin weld on your stock, or are using a parascope for an optic, there's something wrong in your measurements.

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damn,

 

going to do same test again this afternoon, must be something wrong. and i make pictures

Edited by Fasthenk65

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7 hours ago, Fasthenk65 said:

damn,

 

going to do same test again this afternoon, must be something wrong. and i make pictures

 

Run it all over again.

 

A = Shooting from 15 meters / 16,46 yard = 3 shots basically hole in hole as it should.

 

B = 5 shots 25 meters = 27,4 yards

 

AB = 5 cm = 1,96 inch higher then aiming point

 

C = 45 meters = 49,4 yards

 

AC = 11,5cm = 4,5 inch higher then aiming point

 

D = 7 meters = 7,7 yards

 

AD = 3 cm = 1,18 inch lower then aiming point

 

E = 1 meter= 1,09 yards

 

AE = 5 cm = 1,97 inch lower then aiming point

 

So I do not know what went wrong but critics were right.

 

Guess this does live up to normal measurements. 

 

thanks!!

 

PS the black in the middle = 2,9 cm = 1,14 inch... 

 

 

 

IMG_5757.HEIC

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On 2/20/2020 at 6:20 AM, BartCarter said:

Your calculations seem to be way off.  No way you are going to be 6 inches off at 1 meter.  Closer to 2 inches.

5 meters should be close to 1.7 and 10 meters close to .8 inches.

Bart I was indeed wrong, please read new ' test' and comment!

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The main thing here is to know where your gun hits and to be able to compensate for targets that are more than 15 yards from your zero.

 

I zero at 25 because I know my bore isn’t that far below my sight and the last thing I want is to consistently throw shots over the occasional 50 yard steel.

 

50 yard shots take the longest, so I want them to be likely to hit.  Follow up shots on a 1 meter target are speed of finger.

Edited by Whoops!

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On 2/23/2020 at 10:36 AM, Fasthenk65 said:

Bart ... please read new ' test' and comment!

Glad to see you now know where your offsets are.  Good shooting. 😀

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32 minutes ago, BartCarter said:

Glad to see you now know where your offsets are.  Good shooting. 😀

Tnx

Thank you for letting me know my calculations couldn't be right!

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I zeroed at 50 yards with my PCC for 3 Gun.  Having a 50 yard zero allowed me to hold top of the plate on a 6" target at 100 and get hits.  It also have very little deviation at 25 yards thing maybe 1-1.5". 

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I like a 50 yd zero for PCC because I want the up close hold overs to be the same as my other AR's.  I have worked to create a habit of aiming 1.5" high at close targets with my 3gun AR and I want to do the same with my PCC AR.  

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