is there anything else besides scope failure that would cause a 1moa gun to start shooting 11 inch groups at 200 yards using proven ammo? I purchased a used NightForce for my dads sendero(300WM). Im using a warne 20 moa base and badger rings. By the way it is a straight verticle string. It does not move left or right. It will shoot two shots together then the third will be 5 inches high and the next one will be another 5 high. Or I also had first shot three inches low of center, second shot 3 inches high of center, third shot bach to 3 inches low...I figure it has to be the scope, but i know this is very rare for a NF...any ideas? also it was cool today and the barrel was not hot at all..thanks
Accuracy problems
- Thread starter AtownBcat
- Start date
Re: Accuracy problems
Did you check to make sure that the action screws aren't coming loose? Ditto for the scope base and rings. If <span style="font-weight: bold">everything</span> is rock solid and it's still stringing like that, then I'm going to go with broken scope for $200, Alex.
Did you check to make sure that the action screws aren't coming loose? Ditto for the scope base and rings. If <span style="font-weight: bold">everything</span> is rock solid and it's still stringing like that, then I'm going to go with broken scope for $200, Alex.
Re: Accuracy problems
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SRT Supply</div><div class="ubbcode-body">Did you check to make sure that the action screws aren't coming loose? Ditto for the scope base and rings. If <span style="font-weight: bold">everything</span> is rock solid and it's still stringing like that, then I'm going to go with broken scope for $200, Alex. </div></div>
What he said. A small torque wrench is a mandatory tool when it comes to the precision world.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SRT Supply</div><div class="ubbcode-body">Did you check to make sure that the action screws aren't coming loose? Ditto for the scope base and rings. If <span style="font-weight: bold">everything</span> is rock solid and it's still stringing like that, then I'm going to go with broken scope for $200, Alex. </div></div>
What he said. A small torque wrench is a mandatory tool when it comes to the precision world.
Re: Accuracy problems
Without touching the scope between strings, does each string start at point of aim and prgress up? If so, I might suggest checking the rifles bedding (if it has any) and that the action screws have not come loose.
Without touching the scope between strings, does each string start at point of aim and prgress up? If so, I might suggest checking the rifles bedding (if it has any) and that the action screws have not come loose.
Re: Accuracy problems
I have seen scopes do exactly that. However the other guys are right check the bedding and action screws and scope mounting hardwear.
I have seen scopes do exactly that. However the other guys are right check the bedding and action screws and scope mounting hardwear.
Re: Accuracy problems
If you discount the obvious like loose action screws or scope mounts or damaged crown it can only be the scope.
If you discount the obvious like loose action screws or scope mounts or damaged crown it can only be the scope.
Re: Accuracy problems
Does a cleaning patch exhibit any perceptible snagging/dragging when passing through and to beyond the throat? If so, the bore or throat could be past its best-by date. Might be a candidate for a bore scoping.
I think the main reason magnum chambered rifles get tired is because they're getting a bit long in the tooth, and inevitable bore expiration is coming due.
Greg
Does a cleaning patch exhibit any perceptible snagging/dragging when passing through and to beyond the throat? If so, the bore or throat could be past its best-by date. Might be a candidate for a bore scoping.
I think the main reason magnum chambered rifles get tired is because they're getting a bit long in the tooth, and inevitable bore expiration is coming due.
Greg
Re: Accuracy problems
Thanks for the ideas, I had not thought about the action screws. I do have a fat wrench and tightened everything dealing with the scope down to speck, but the stock which is an unbedded HS, was not checked at that time.Like i mentioned though it was a proven 1 moa gun so i dont think the lack of bedding is the problem but loose action screws would make sense.
Greg, The gun is less that a year old with no more than 400 rounds down the tube, unless i damaged it somehow(not likley but possible) I dont think it would be the bore going south..
Thanks for the ideas, I had not thought about the action screws. I do have a fat wrench and tightened everything dealing with the scope down to speck, but the stock which is an unbedded HS, was not checked at that time.Like i mentioned though it was a proven 1 moa gun so i dont think the lack of bedding is the problem but loose action screws would make sense.
Greg, The gun is less that a year old with no more than 400 rounds down the tube, unless i damaged it somehow(not likley but possible) I dont think it would be the bore going south..
Re: Accuracy problems
I had a similar situation with a Ruger SR 556. Shot great, next outing shotgun patterns. I thought it was the scope Turned out to be something in the rifle which Ruger fixed. As others have said if the obvious fixes don't cure your problem I'd try the scope route. If the rilfe has iron sights I'd see how it shoots with those. That's what convinced me it was my rifle. I don't think you bore went south after 400 rounds.
Good luck fixing your problems
I had a similar situation with a Ruger SR 556. Shot great, next outing shotgun patterns. I thought it was the scope Turned out to be something in the rifle which Ruger fixed. As others have said if the obvious fixes don't cure your problem I'd try the scope route. If the rilfe has iron sights I'd see how it shoots with those. That's what convinced me it was my rifle. I don't think you bore went south after 400 rounds.
Good luck fixing your problems
Re: Accuracy problems
i agree with everyone else. ive had similar problems with a friends rifle and after another scope didnt fix the problem it turned out the reloads he was buying were not reliable. and just a question im not trying to doubt your shooting but it is a 7mm are you sure its not shooters flinch?
i agree with everyone else. ive had similar problems with a friends rifle and after another scope didnt fix the problem it turned out the reloads he was buying were not reliable. and just a question im not trying to doubt your shooting but it is a 7mm are you sure its not shooters flinch?
Re: Accuracy problems
If you leave primers or powder in a humid place I've heard it can be troublesome.
If you leave primers or powder in a humid place I've heard it can be troublesome.
Re: Accuracy problems
Action screws
Mounts
Rings
Check muzzle crown for damage/nicks
Use factory ammo (or the 1 MOA proven stuff)
Then shoot with either another scope froma proven firearm or iron sights
THEN claim the $1300+ scope is bad
Action screws
Mounts
Rings
Check muzzle crown for damage/nicks
Use factory ammo (or the 1 MOA proven stuff)
Then shoot with either another scope froma proven firearm or iron sights
THEN claim the $1300+ scope is bad
Similar threads
