Hello CGNers,
I just built a new AR15.
Using Aero Precision upper/lower
16" Rainier arms select medcon barrel (1 in 8")
Geissele SSA-E trigger
Kinda a budget optics, bushnell AR-Optics mounted on a Burris P.E.P.R mount.
Shooting using a Harris bipod and a rear bag. I am very stable on the target and the trigger pull is light and crisp.
I have probably 300 rounds through it over three trips to the range. Every time i shoot, i shoot poorer than the last time.
First time shooting the rifle, took me 5 rounds to zero the scope. Then put 5 rounds easily sub moa @100yards. The first 4 shots were probably like 1/2 moa (4 shots, 1 hole that can be completely covered by a dime in my pocket) and then the 5th was a flier to open the group closer to 1moa (all 5 covered by a quarter). This seemed just fine to me
From then on its just been down hill. By the end of the first day (approx 100rds) my 3-shot group size was closer to 1.5~2moa.
Next time to the range i started at about 1.5moa and by the end of the day was shooting 3.5ish moa.
Third time to the range the targets look more like they are being shot with a shotgun. There is no pattern at all to the shots, i'm not consistently shooting one way or another. I feel great about each shot, and then am surprised when the POI is 5 inches right, second shot might be 3 inces high and to the left, followed by a 4 inches low. Just all over the place. I ended the day by shooting 15rds at the same target. The group size was probably (guesstimate) 8 inch diameter, with no pattern what so ever. No two bullets hit the same place, evenly dispersed high, low, left, and right.
I have used a variety of ammo, norino, federal, MFS, S&B match, etc in a variety of weights (55, 62, 69). They all performed about the same. My best shots were typically with 55gr ammo.
If i had to guess i would say i'm shooting worse than with my norinco CQA, I'll take it out next time with a similar setup to see what the results are.
I have checked all the typical things that i felt might cause an issue, the burris P.E.P.R is securely mounted to the rail. The scope is not moving in the rings. I even went so far as to take the FF hand guard off and check the torque on the barrel. I have re-checked the level of the reticle, and am waiting for a anti-cant device just to further eliminate any sources of error (as much as is possible).
Other than this, the rifle functions flawless and has not had a single issue, failure, or stoppage in any way.
So CGN i'm respectfully looking for your advice, do you think its just that i need to practice more (which is fine by me!) or do you think i should be hunting for a hardware issue?
I just built a new AR15.
Using Aero Precision upper/lower
16" Rainier arms select medcon barrel (1 in 8")
Geissele SSA-E trigger
Kinda a budget optics, bushnell AR-Optics mounted on a Burris P.E.P.R mount.
Shooting using a Harris bipod and a rear bag. I am very stable on the target and the trigger pull is light and crisp.
I have probably 300 rounds through it over three trips to the range. Every time i shoot, i shoot poorer than the last time.
First time shooting the rifle, took me 5 rounds to zero the scope. Then put 5 rounds easily sub moa @100yards. The first 4 shots were probably like 1/2 moa (4 shots, 1 hole that can be completely covered by a dime in my pocket) and then the 5th was a flier to open the group closer to 1moa (all 5 covered by a quarter). This seemed just fine to me
From then on its just been down hill. By the end of the first day (approx 100rds) my 3-shot group size was closer to 1.5~2moa.
Next time to the range i started at about 1.5moa and by the end of the day was shooting 3.5ish moa.
Third time to the range the targets look more like they are being shot with a shotgun. There is no pattern at all to the shots, i'm not consistently shooting one way or another. I feel great about each shot, and then am surprised when the POI is 5 inches right, second shot might be 3 inces high and to the left, followed by a 4 inches low. Just all over the place. I ended the day by shooting 15rds at the same target. The group size was probably (guesstimate) 8 inch diameter, with no pattern what so ever. No two bullets hit the same place, evenly dispersed high, low, left, and right.
I have used a variety of ammo, norino, federal, MFS, S&B match, etc in a variety of weights (55, 62, 69). They all performed about the same. My best shots were typically with 55gr ammo.
If i had to guess i would say i'm shooting worse than with my norinco CQA, I'll take it out next time with a similar setup to see what the results are.
I have checked all the typical things that i felt might cause an issue, the burris P.E.P.R is securely mounted to the rail. The scope is not moving in the rings. I even went so far as to take the FF hand guard off and check the torque on the barrel. I have re-checked the level of the reticle, and am waiting for a anti-cant device just to further eliminate any sources of error (as much as is possible).
Other than this, the rifle functions flawless and has not had a single issue, failure, or stoppage in any way.
So CGN i'm respectfully looking for your advice, do you think its just that i need to practice more (which is fine by me!) or do you think i should be hunting for a hardware issue?
