POI changes Weihrauch hw97 blackline-stl 4.5mm

[canonsvogel]

Hello,

I just bought my hw97 and I already shot 800 pelletts with it. It is bloody accurat! I use the artillery hold to shoot it and try to hold every time the same. I shoot in the backgarden, so i can obly shoot 20m. I experienced that my POI changes every time I don't shoot directly after the previous shot. So if I change the target-card my POI is somewhere else. My scope is a ecohunter 3-12x50 and I have hawke mount for it. I shoot with 4.5mm 7.9 gr crosman hollowpoints. I already tried to use the pointed version, but it didn't prevent a change of the POI.

(all these shot were done with the same scope setting and were shot on the same day)

What can I do to prevent a changing POI as I don't like to zero my scope every 5 minutes.


thanks,
Bram van manen 

 

[addertooth]

I would tend to suspect bad optics or changing cheek weld (your eye is not in the same sweet spot, and parallax is changing your point of aim).
Spring Air mechanisms are notorious for damaging scopes. See if you have a buddy in the Netherlands who can loan you a different scope for a test. 
With the artillery hold, the EXACT spot you place your front hand, and how tightly you grip also affect your point of impact. It is key to have the exact same holding location and force for each shot to have true repeatability in point of impact. 

 

[canonsvogel]

Thanks for your reply

I bought my scope with my gun, so I don't think it is the scope. Or it must be a very bad scope and break in 4 days.

 

[addertooth]

Something is definitely off. Your good groups should be better. A lot of people claim hole in hole shots at 40 meters with that rifle. In all fairness, that is likely with weighed and gauged pellets. This photo is of groups from a .22 caliber Benjamin Trail II NP2 air rifle (break barrel spring air) with a cheap UTG scope, fired from a wobbly tv dinner tray at 25 meters with unsorted pellets. The holes are all covered by an American Nickle, which is about 21mm. Under any condition, the HW97 should be doing much better.

 

[canonsvogel]

I think that i should try the jsb exact diabolo and see if it makes a diffrence.

 

[addertooth]

JSB makes excellent pellets, good choice.

 

[canonsvogel]

Thabks for your reply,

But what I don't undestand is why the crosman hollowpoints score very good with the hw97? Is it than how I hold my gun, the pellets or my scope?

 

[Springrrrr]

"canonsvogel"I think that i should try the jsb exact diabolo and see if it makes a diffrence.

Agreed on the JSB's

Keep in mind, every gun is different and what works in one just may not work in the next one off the assembly line. That is just the way it be.

Make sure all the screws are tight and the barrel is clean. Make sure the scope mount screws are tight also.

>>>> A lot of people claim hole in hole shots at 40 meters with that rifle. In all fairness, that is likely with weighed and gauged pellets. <<<<<
Nope, 40 yards stacked pellets right out of the tin. JSB 8.44 grain 177's windless day!!!

 

[Windmill01]

I can only repeat what everyone else has said. Make sure all screws, Scope, stock and trigger are tight. By the looks of your groups first and second photos it’s not the pellets if you are using the same tin imo. I put a new Hawke Airmax on my HW77 and it failed I the first week. Groups similar to yours before and after failure. Good luck.

 

[markfina]

It takes practice with a springer and the the right pellet for your gun ,just about the time you think you have it mastered it will kick you in the nuts hang tough you will master it as everybody else has said make sure all of bolts and screws are tight. 

 

[c_m_shooter]

Most everyone I know with an HW97 has best accuracy with H+N FTT pellets. I have better consistency not with the artillery hold. I pull the stock firmly into my shoulder with the right hand, but always point my thumb straight forward. The POI will change an inch at 30 yards depending on if my thumb is forward or across the grip.

 

[mobilemail]

I think everyone who has commented is a better shooter than me, but I can add my personal experience.

When I bought my HW97KT over a year ago, I thought it was an amazing shooter, and was incredibly accurate with H&N Field Target Trophy 4.52 pellets. But I did notice some POI shift. I chronied the rifle and discovered shot to shot velocity was actually changing as much as 50fps. So I shipped off my rifle for a pro tune by Motorhead in CA, and when it came back the rifle was even smoother and with shot to shot velocity difference ~10fps, and POI shift was gone. I would suggest you chrony your rifle and see if you might have a similar condition. And I have always gotten better consistency with H&N or JSB pellets over the Crosman Premier in the tin.

 

[Gear_Junkie]

Yep, H&N FTT's for the win!

 

[John "spysir" Blount]

I switched from pre-charged to springer and "12fpe" at the same time. Naturally ran through scopes a bit but ugh.
Picked what I thought a working scope and took it to the FT club then handed it to s springer shooter. Rifle and scope were fine ( "your trigger, umm, isnt, well, you know..") ..
Have a more experienced shooter handy?

Naturally could be the scope, yes they can go bad instantly.

Now if you are getting good groups ( plural ) as shown, then scattered and with NO adjustment , what happens if you keep shooting say a 50 shot card? POI change? A bad scope should change often and you'll likely see it in a many shot group.

Hold is EVERYTHING in some springers. Thumb in the same place, left toe in the same place & pressure, ... .

I'd lean slightly more towards it being your hold after walking than the scope but slap any other scope on e.

John

 

[FlexWagtail]

This long thread may help. Read to the end as it documents a lot of advice and progress over time with the HW97. Bottom line, the gun mystified me at first but I learned as the gun broke in. I became a better shooter and the gun became less powerful and more consistent as the spring wore in. 
https://www.airgunnation.com/topic/your-top-five-tips-for-hold-sensitive-springers/page/2/