DPMS, 22LR (Bull Barrel) Upper, and Nikon P22 NIKOPLEX 2-7x32 Scope Review

I picked up some CCI MINI-MAG 22LR CPHP 36 GR, 1260 FPS and CCI 22LR STINGER CPHP 32GR, 1640 FPS to through into the mix.

CCI Stinger ammunition does come with a warning:

Use only in firearms having standard ANSI sporting barrel/chamber dimensions.

Which basically means that you should not run in a match chamber (tight tolerances) because the stinger cartridge is longer than a standard 22lr cartridge and could cause problems such as hanging up, jammed, etc


Now would be a good time to mention that you should always read the manufactures recommendations about ammunition types to use (warnings) in your weapon.

Hyper Velocity rounds are made for varmints and should not be used on squirrels and rabbits (Use a lower velocity ammo) if you plan to eat them, because of the damage they cause to the meat!

And if you are unsure about anything; call, email, or write to the manufacture.
 
Do you know if this upper can be paired with Rock River Arms lowers? I'm completely unfamiliar with the process of building ARs.
 
Tx., I am enjoying the heck out of your breaking in and learning adventure with the DPMS 22LR upper and Nikon P-22 Scope. Kind of torturing me as I have been waiting on a P-22 Scope for 3 months but everyone keeps buying them!
Patience should pay off soon, I'm buying one!
I have shot that DPMS and been around ladies, yes ladies, who shot 1000's of rounds at a DIVA Outdoor's event. no issues at all and some were shooting Ghost Targets, about the size of an asprin tablet!

Ok, I"m better now, still can't wait to get shooting.
Keep us posted.
 
Bart,

I’m hoping that you can give or get me some clarification and/or define this statement found on Nikon‘s website about the P-22:

“Designed for extreme sighting speed and superior accuracy from Rimfire AR platform rifles”

I know there are many variables such as, the shooters ability, weather, ammo consistency, etc.

But (hypothetically) let’s say that I’m shooting the best I have ever shot in my life, I’m getting exactly 1250 fps out of the ammo and my barrel, .50” consistence grouping @ 50yds, also assuming there is no wind, etc

If I turn my elevation turret from 50yds (zero) to 150yds, will I be “Dead On” at 150 yds. (same as 50 yds with .50” groupings)?

I understand that you do not have the P-22, however with the access you have to Nikon and information, I was hoping you would be able to help me out with this information so I can give a fair review (realistic) of the product.


How far was the asprin size ghost targets and was it indoors ?

 
Range Day Report 2 (7-28-12)


Clear, 81 degrees w/02 mph wind, 96% Humidity @ 8am (beginning)

Clear, 101 degrees w/5 mph wind, 52% Humidy @ 6:15 pm (End)

My wife and I had a very interesting day to say the least. The gun , clip and Plumcrazy Lower functioned great.

We chronograph the ammo and tested the P-22 rapid elevation turrets rated for std velocities of 1200-1300 fps and the hyper velocities of 1400-1640 fps.

Using the original 50yd zero and fouled barrel, the 50yds groupings were pretty consistent with the last range day groupings.

However, when I moved out to the 75yd targets is when we noticed that the groupings (all) shifted up on average by 2-3”, 100yds average grouping shifted 9-10”….long story short the turrets are off as much as 63%.

Note: After shooting the Standard velocity ammo, we changed to the hyper velocity turret (matching to the turrets FPS ratings).

Down below is the ammo used, chronograph readings taken (stopped at 100yds because turrets are not calibrated properly), and grouping pictures:

Standard Velocity Ammo:

Target 1 - Federal, Value Pack, HP, 36 gr, 1260 fps

Chronograph Readings:
50yds-1216, 1217,1213, 1232 & 1233
75yds- 1235, 1282, 1198, 1263 & 1242
100yds- 1251, 1204, 1225,1231 & 1247

Target 2- Federal, Champion, Round Nose, 40 gr, 1240 fps
Chronograph Readings:
50yds- 1230, 1213, 1198, 1185 & 1218
75yds- 1208, 1227, 1182, 1228 & 1197
100yds- 1244, 1229, 1192, 1232 & 1243

Target 3 - CCI, Mini-Mag, Copper Plated Hollow Point, 36 gr, 1260 fps
50yds- 1289, 1233, 1252, 1243 & 1230
75yds- 1231, 1240, 1261, 1268 & 1246
100yds- 1240, 1228, 1263, 1224 & 1261

Target 4 - CCI, Mini-Mag, Round Nose, 40 gr, 1235 fps
50yds- 1243, 1227, 1241, 1174 & 1207
75yds- 1204, 1086, 1160, 1191 & 1245
100yds- 1180, 1182, 1173, 1195 &1163

Target 5- Winchester, WildCat, 40 gr, Round Nose, 1255 fps
50yds- 1206, 1200, 1187, 1173 & 1192
75yds- 1223, 1180, 1210, 1202 & 1226
100yds- 1232, 1230, 1221, 1223 & 1199

Target 6- Winchester, Super Speed, Round Nose, 40gr, 1300 fps
50yds- 1206, 1200, 1187, 1173 & 1192
75yds- 1223, 1180, 1210, 1202 & 1226
100yds- 1232, 1230, 1221, 1223 & 1199

Target 7- Remington, Golden Bullet, Round Nose, 40 gr, 1256 fps
50yds- 1227, 1204, 1226, 1215 & 1274
75yds- 1244, 1226, 1238, 1251 & 1264
100yds- 1234, 1257, 1221, 1201 &1249

Target 8- Remington, Viper, Truncated Cone, 36 gr, Hyper Velocity, 1410 fps
50yds- 1330, 1329, 1354, 1306 &1329
75yds- 1325, 1325, 1288, 1313 & 1338
100yds- 1319, 1335, 1358, 1349 & 1331

Note: Even though the Viper is rated as Hyper Velocity (Borderline FPS), as you can see from the chronograph readings that it fell more within the standard velocity out of this barrel mainly because of the 16” length. The research I have done claims that minimum velocity is lost in a 16 inch barrel because all the powder successfully burns in the barrel by 16“. However, I don’t know exactly what length barrel, etc was used to achieve the FPS for each ammo (the importance of using a chronograph).

Hyper Velocity Ammo:

Target 9 - Remington, Yellow Jacket HP, 33gr, Hyper velocity, 1500 fps

50yds- 1458, 1419, 1498, 1360 & 1448
75yds- 1509, 1440, 1343, 1391 & 1280
100yds- 1423, 1384, 1357, 1441 & 1428

Target 10 - CCI, Copper Plated Hollow Point, 32gr, Hyper velocity, 1640 fps
50yds- 1503, 1515, 1548, 1475 & 1533
75yds- 1525, 1502, 1499, 1517 & 1510
100yds- 1521, 1570, 1502, 1539 & 1528

50yd Targets
p-22-scope-50yda.jpg

p-22-scope-50ydb.jpg


75yd Targets
p-22-scope-75yda.jpg

p-22-scope-75ydb.jpg


100yd Targets
100yrdssmaller.gif


Suspicious that somehow the etched turrets might have been mis-marked and missed by Nikon QC. Went over to Nikon’s website and using “Spot On” ballistics calculator, CCI MINI-MAG 22LR CPHP 36 GR, 1260 FPS, 14’ above sea level, etc, No mistake the turrets markings matched the clicks that the program said they needed to be “Spot On” in inches.


After doing some basic calculations, decided to start at the 50yds zero and start dialing in the ranges myself.
Down below is the difference between the turret markings (clicks values) verses dialing:

turrets.png


As you can see the calibration of the turrets is not even close so I’m going to contact Nikon (send them a link to my review) to see what they have to say and will report back to everyone!





 
Tx., Great wk. I pm'd you to let you know that looking at your targets I think the issue is that this scope is calibrated for .25 in clicks at 50 yards thus giving you a .50 inch adjustment at 100 yards.
Does that coincide with the results you received Kenny?

I've had a few guys contact me who didn't realize the .25 @ 50 yards.
Let me know what you think and we'll go from there. Keep up the good work.
Bart
 
The turret (etched on top) states it is 1/4 inch at 50 yrds yet if you look at the chart the actual marks that are printed on the turret are not correct. If you put the turret zeroed (50)and then turn the dial to 75 it takes 7 clicks to get to the 75 yards mark. The problem is that it makes it way to high. You only need 3 clicks from 50 yrds to reach the proper dial calibration for 75 yards. The difference only increases the further from 50 yrds you get.

The turret actually has ONLY markings for 50 yrds, 75 yrds, 100 yrd, 125 yrds and 150 yrds; there are no other marks inbetween or any numbers listed on the turret. Unless you actually count the clicks you have no way of dialing it in properly since the markings on the turret do not match the actual distance as you shoot.

Example:

When dialing (counting clicks) in for "dead on" at 150yds, the turret was 3 clicks (between 75 & 100)shy of the 100yd marking.

PS: We had a very long range day yesterday and I need to go back (start fresh) and verify the values at each distance,
Just not sure when I can.

However, There is no doubt that the turret markings, etc are off. I plan on using a fluorescent pen to mark vertical lines in ½” increments and set at 50yds to check adjustment values.


Thank you for your help and immediate response






 
Last edited:
I was informed yesterday that my scope will be replaced. As soon as, I receive my replacement scope, and when time allows, I will post some results.

Thanks Bart Hege for the help!
 
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