I bought a barely used (virtually new) 527 Hornet Lux that is a 2009 manufacture. It has the small metal front sight and a non adjustable for elevation rear sight. I put ten rounds through it the other day and it is just one inch high at 100 yards but ten inches wide to the right. I can slide the rear over and correct that but I want to put a NECG peep on it and there is not enough horizontal movement on that to get the bullet on target. NECG is not answering their phone but I'm not sure they would have an answer anyway. I don't want to mount a scope either. I am very used to the peep on my Sako Finnwolf and another rifle so it would be nice to keep the trend going. Anyone else run into this?
cz 527 sights
- Thread starter Harrrley
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Dave DeLaurant
Member
To be honest, I've never even shot my fullstock .223 with the factory open sights. I had a scope on it for awhile, but soon went to the NEGC peep/front blade combo:
What I can say is that their rear sight is fixed very solidly in its dovetail. I tried to tap mine out and replace it with a dovetail blank, but it wouldn't budge with any degree of force that I was comfortable using. Doesn't really matter, since the peep has a higher sightline -- you need their extra-tall front insert to get a proper zero. The NECG peep has a fair range of windage adjustment, but it's a little crude -- you loosen one side and tighten the other. But once zeroed it stays that way.
But to your problem: have you had the action out of the stock and visually checked sight alignment, looking from the muzzle backward? If it's entirely a sight problem, they should be visibly misaligned (rotationally) to produce such a wide error. That's something for the factory to address.
If the alignment appears OK, could there be some stock warping putting pressure on the barrel? Have you tried some different brands of ammo and different bullet weights?
What I can say is that their rear sight is fixed very solidly in its dovetail. I tried to tap mine out and replace it with a dovetail blank, but it wouldn't budge with any degree of force that I was comfortable using. Doesn't really matter, since the peep has a higher sightline -- you need their extra-tall front insert to get a proper zero. The NECG peep has a fair range of windage adjustment, but it's a little crude -- you loosen one side and tighten the other. But once zeroed it stays that way.
But to your problem: have you had the action out of the stock and visually checked sight alignment, looking from the muzzle backward? If it's entirely a sight problem, they should be visibly misaligned (rotationally) to produce such a wide error. That's something for the factory to address.
If the alignment appears OK, could there be some stock warping putting pressure on the barrel? Have you tried some different brands of ammo and different bullet weights?
My rear dovetail sight was easily moved with a brass punch to zero the sights on the target. I see nothing visually on the stock that might cause the problem either. I have not had the action out.
I've only used two different brands but similar bullet weights and the results are the same, but I'm really not concerned with tight bullet grouping yet. Different ammo affects vertical trajectory but not horizontally is my experience. I could shoot it as it is now but I want to be able to use the NECG peep instead of the rear iron sight.
I know about the changeable front insert to correct elevation issues but until I can correct windage that doesn't matter. I just can't move the NECG peep far enough to the left to make it work. With the peep adjusted all the way to the left the bullets hit approximately four inches right of aim point.
I've only used two different brands but similar bullet weights and the results are the same, but I'm really not concerned with tight bullet grouping yet. Different ammo affects vertical trajectory but not horizontally is my experience. I could shoot it as it is now but I want to be able to use the NECG peep instead of the rear iron sight.
I know about the changeable front insert to correct elevation issues but until I can correct windage that doesn't matter. I just can't move the NECG peep far enough to the left to make it work. With the peep adjusted all the way to the left the bullets hit approximately four inches right of aim point.
Dave DeLaurant
Member
Next step: https://cz-usa.com/support/contact/
Skylerbone
Member
Nothing to add beyond a welcome to THR and wishing you luck on solving the issue.
Customer support at CZ was unhelpful. He said it's not unusal to have to move the rear sight a lot for windage. I say BS! I've been shooting for over 60 years and never had to move the sight so far on any of my rifles and there have been a bunch. Actually, few rifles have needed any windage adjustment from the factory. Hopefully NECG can be of some assistance but the fellow I need to talk to is still out with covid.
I was out yesterday and at 100 yards using the peep I achieved a 1 1/2" three shot group twice... although 4 inches right of aimpoint. It's a good consistent shooter so there's that.
I was out yesterday and at 100 yards using the peep I achieved a 1 1/2" three shot group twice... although 4 inches right of aimpoint. It's a good consistent shooter so there's that.
Dave DeLaurant
Member
One more suggestion: try taking the stock completely off and putting it back on. It's a long shot, but easy enough to try.
One time when I did this on my 7.62x39 rifle, on my first try I managed to seat the action back into the stock with a slight cant that caused the magazine to bind. Everything looked OK from the outside and the TG screws were fully snugged. I tried again and got it back into the stock correctly -- later the same thing occurred with my .300 Blackout 527 and its factory synthetic stock.
One time when I did this on my 7.62x39 rifle, on my first try I managed to seat the action back into the stock with a slight cant that caused the magazine to bind. Everything looked OK from the outside and the TG screws were fully snugged. I tried again and got it back into the stock correctly -- later the same thing occurred with my .300 Blackout 527 and its factory synthetic stock.
Dave DeLaurant
Member
I wouldn't think so, but there's always a first time. Just clutching at straws here.
Dave DeLaurant
Member
An unhelpful aside: a couple years ago I had a pair of sights installed by a local smith on a Martini Cadet project rifle:
When I took it to the range, the groups were almost 8" left of center at 15 yards! Turns out the front sight was installed a couple degrees left of 12-O'Clock. Since the base was screwed to the barrel, the best fix would probably involve cutting a dovetail to remove the off-center hole. Someday I'll find someone with the necessary skills, but for the time-being I kluged a solution by installing a front sight that I made from a dovetail blank and machine screw -- I drilled the hole for the screw at a complimentary angle to the base error, then cut the screw to length and turned it to a point, Not the most elegant fix, but at least I'm zeroed for now.
When I took it to the range, the groups were almost 8" left of center at 15 yards! Turns out the front sight was installed a couple degrees left of 12-O'Clock. Since the base was screwed to the barrel, the best fix would probably involve cutting a dovetail to remove the off-center hole. Someday I'll find someone with the necessary skills, but for the time-being I kluged a solution by installing a front sight that I made from a dovetail blank and machine screw -- I drilled the hole for the screw at a complimentary angle to the base error, then cut the screw to length and turned it to a point, Not the most elegant fix, but at least I'm zeroed for now.
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