JJ wrote:I would be checking the gas block, barrel nut, anything that could be affecting/touching the barrel.
Second, I would check the scope mounting. Make sure your rings are not resting on the radii leading to the saddle, objective etc. (rings should be about 1/8" away from any radius on the optic body).
Lastly, don't chase individual shots with scope adjustments. Make three shot groups and make inputs based on the results from those sub-groups. Otherwise you could be chasing a shifting POI, with a shifting POA, which will double excaberate your results.
Bearcatrp wrote:JJ wrote:I would be checking the gas block, barrel nut, anything that could be affecting/touching the barrel.
Second, I would check the scope mounting. Make sure your rings are not resting on the radii leading to the saddle, objective etc. (rings should be about 1/8" away from any radius on the optic body).
Lastly, don't chase individual shots with scope adjustments. Make three shot groups and make inputs based on the results from those sub-groups. Otherwise you could be chasing a shifting POI, with a shifting POA, which will double excaberate your results.
I did exactly this. I started chasing the shots. I always shoot the commercial rounds 1st to get comfortable shooting and insure I am on target. Always shoot 5, same as reloads. Then I begin with lowest and work up. Was on my 4th groupd of reloads with different powder. Thats when things went to ****. 1st, the shots were going right. Thought I was pulling. After a few more that went left, I adjusted. Then the rounds went high. Adjusted. Then went low. All withing 5 inches of center target. Then I stopped on the reloads and started with the hornady 168 A-max's, which all my reloads were with A-max bullets and commercial brass, not LC that I use on my plinking 150 fmj bullets. Did the same thing. Chased the holes until I went through 3 boxes. Stopped! Once I figure this out, have to go re-zero with commercial rounds again.
Here is what I have:
DPMS Oracle 7.62 with 16 inch barrel.
Nikon M-308 scope with nikoplex reticle
Timney trigger
Brass was once fired commercial winchester and hornady brass. NO crimping on these reloads.
Bullets were Hornady 168 gr A-Max
Primers were CCI
Barrel was resting on sand bags
Temp was 70F with little to no wind
Del tone range in st cloud ( just 2 at the range so plenty of room)
farmerj wrote:can / did you keep your targets?
posting them would be a real help.
Did the wind pick up?
OldmanFCSA wrote:Scope failure.
Bearcatrp wrote:OldmanFCSA wrote:Scope failure.
That did cross my mind. So, is there a test of some kind to determine it actually failed before contacting nikon and sending it in? Being on a AR with less recoil than a bolt, and the M-308 is designed for the AR 308 platform, would think this scope would be tough enough not to fail. BTW, you didn't answer my PM's.
Users browsing this forum: No registered users and 22 guests