17Hmr Loosing Zero

[dancott94 0]

Hi all, I have a problem with my CZ 17hmr style, it keeps loosing its zero every time I use it! I have hawke match style mounts on a weaver rail and a MTC Taipan 6x24x56 scope, Harris adjustable bipods a SAK moderator and I have fitted a lighter yodaves trigger kit.

I have set the eye relief on the scope so I do not have to move my head and so I get a clear image through the scope.

The only thing I can think of is that when I fitted the trigger kit I didn't use a torque wrench on the action bolts I just guessed them.... Could this cause it to loose zero all the time?

Please someone help me haha it's really getting on my nerves! Thanks, dan.

[rimmer 33]

if the action is loose then yes you will be shooting all over the place but if they are tight then that wont be the problem, you must remember if a mole farts in the next county the .17 poi will be effected!!!!!!!

[Hawkeye. 26]

Make sure that the barrel is not touching the stock. Slide a sheet of paper between the stock and barrel back to the action to ensure clearance. Check to see if the front sling screw does not go through the stock and touch the barrel when in the firing position.

Has it ever had a consistent zero ? eg ; group of 3 in a 2" bull at 100yds

[dancott94 0]

No I have mad sure to shoot it on a calm day ie no breath of wind what so ever and I have free floated the barrel on it as it was catching at the front of the stock. Could it be that I only use a soft gun slip to transport the gun and not a hard case could that be the cause of it loosing zero every time literally? It does group very well when I re zero it, I shoot off sandbags and it groups 5 shots in an inch and a half approximately and it holds it poi as I use it its just when I next come to use it it needs setting up again!

[The Seeker 3,048]

Make sure mod is tight, check the crown on the barrel, if both are fine try another scope.

[Hawkeye. 26]

perhaps it is getting knocked or adjusted in transit

[Hawkeye. 26]

Are the locking nut's on the turrett's tightened after setting zero ?

[dancott94 0]

Yep the locking nuts are tightened after I zero it back in, personally I think its either a faulty scope or it getting knocked in transit. What scope you guys recommmend? For say a budget of £500?

[Deker 3,478]

Make sure that the barrel is not touching the stock. Slide a sheet of paper between the stock and barrel back to the action to ensure clearance. Check to see if the front sling screw does not go through the stock and touch the barrel when in the firing position.

Has it ever had a consistent zero ? eg ; group of 3 in a 2" bull at 100yds

 

The Style was not designed to have a Floating Barrel, and it hardly matters anyway on a HMR, virtually everyone who mounts a bipod on any of the plastic stock CZ Rimfires, and many of the wood stocks, ends up contacting the barrel, so does anyone who uses a sling, they tend to be rather flexible!

[Deker 3,478]

The trigger can wave about like a flag, the stock can contact the barrel as much as you like, ammo can even be clipping the mod (do you have one?) none of that will make it keep losing zero, IF you can set the zero up!

 

As long as everything is bolted on tight and stays bolted on tight the problem is very likely to be the scope!

[dadioles 68]

So, if I am reading this right. You go out and set up your zero. The rifle then shoots well for that session with reasonable accuracy.

The gun then rests up for a few days and when you go out again the zero has moved.

That sounds like your scope or mounts to me.

Are your scope turrets adjusted anywhere near their extremes? It is certainly a good idea to wind your turrets from one extreme to the other and then back to the centre. Shim the mounts if needed so that when you zero your rifle the turrets are not too far from their central position.

Are your scope mounts properly fitted and nice and tight? There is not much recoil but the scope could get moved about a bit in transit. A soft case is fine.

Good luck

[cyclonebri1 8]

Keeps losing zero isn't much of a description to be honest. as the guy above asks, what exactly is it doing.

 

Are you zeroing at the end of a range session when it's hot, and then finding it's moved when cold???

 

What size group are you trying to achieve?

 

Two dead calms shooting day on the trot are unusual, you may also be chasing the wind

[rimmer 33]

So, if I am reading this right. You go out and set up your zero. The rifle then shoots well for that session with reasonable accuracy.

The gun then rests up for a few days and when you go out again the zero has moved.

That sounds like your scope or mounts to me.

Are your scope turrets adjusted anywhere near their extremes? It is certainly a good idea to wind your turrets from one extreme to the other and then back to the centre. Shim the mounts if needed so that when you zero your rifle the turrets are not too far from their central position.

Are your scope mounts properly fitted and nice and tight? There is not much recoil but the scope could get moved about a bit in transit. A soft case is fine.

Good luck

Was that writting for the sake of it lol

[AR177 588]

When did this problem start? Because if you tell us it started after you dropped the rifle or after you had the barrel cut down we could probably work out what's wrong.

 

Fitting the trigger kit shouldn't have aFfected it at all unless the stock screws are loose and the action moves in the stock

 

Sounds more like a scope or mount problem, do you have another scope you can try?

 

ATB

 

Adam

Edited June 4, 2013 by AR177

[PLEDGEY 496]

Have you got a really good tight 'face fit' on the stock?. When your cheek is up against the stock can you see straight down the scope or do you have to lift your head?. I had the same problem, never really happy with the HMR's zero, and it was 'face fit'. Packed it out so now the cheek is nice and tight and i look straight down the barrel. Getting an inch groups, give or take, at 100yrds.