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Author Topic: All over the place  (Read 8969 times)

Offline RoadKing

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All over the place
« on: September 29, 2009, 03:57:59 AM »
I have a .177 Whisper that has been tuned and have a GRT-III trigger installed.  My scope is the stock one that came with the gun installed on a varmit hunter base. (I like the fact that it has a laser/light for night  hunting)  I have purchased a pellet sampler pack from straight shooters and found that Beeman H&N match 7.55grain and Predator Polymags 8.0 grain seem to be my guns favorite food.  I will get the scope sighted in to a pretty tight group @ 20 yards, but if I let the gun sit for a period of time my grouping goes way off and I must repeat the sighting in process.  I don't think my scope is moving or is loose.  Is this normal?  Can a gun get "warmed up" and perform differently when cold?  I would guess that I have close to 1000-1200 assorted pellets through it and never over 9.5 grain.  I am looking for my gun to be consistent, have a good grouping and be that way when I take it out of the gun case when a tree rat presents itself.  Do I need  to continue my quest for the "perfect pellet" or am I doing something wrong?  Would an "Accushot" one piece base and different scope help?  If so, I would like to hear some recommendations.  I shoot prone with a bi-pod from a very stable platform.  I try and be consistent with my grip, eye/cheek position and breathing from shot to shot.   :0
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Offline Big_Bill

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RE: All over the place
« Reply #1 on: September 29, 2009, 05:15:37 AM »


Hello Jim,



There are a few thing that you can take a look at !



First and always check to see that your stock screws are tight, very snug, not very,very tight !



Then check the scope and mounts. Take a pencil and mark the front and back or the rings that hold the scope, then mark the mounts were they connect to the mounting rails, this will show you if the scope or mounts are moving. From longislandhunter !



Then, check to see if you front muzzle break is loose, or if you have any gray streaks contacting the break.



Finally for me, You didn't say who did your tune ? If Bob or Gene did your tune I wouldn't mention this, but some people that tune air guns, shouldn't ! and your seal may damaged ! Or you may have questionable parts installed.



I hope this helps you out ! If not let us know !



Bill

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Offline rkr

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RE: All over the place
« Reply #2 on: September 29, 2009, 05:16:51 AM »
Could it be the moderator? Pellets touching the baffles I mean. If for some reason the moderator "lives" during the storage and gets off the barrel line.
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Offline North Pack

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Re: All over the place
« Reply #3 on: September 29, 2009, 10:11:11 AM »
Had the same problem today with my Crosman 800X, - BOTH stock screws were loose. ... Any problem with using Loctite I wonder?
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Offline Big_Bill

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Re: All over the place
« Reply #4 on: September 29, 2009, 03:51:01 PM »


John,



If I were to use Loctite, I would only use the removable "BLUE" Loctite, and use the least amount possible.



Bill

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Life Member of The United States of America
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SHOOT SAFE ! - SHOOT WELL ! - SHOOT OFTEN !
Always Use A Spring Compressor ! and Buy the GREAT GRT-III & CBR Triggers, cause they are GRRRREAT !

Offline North Pack

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Re: All over the place
« Reply #5 on: September 29, 2009, 11:52:34 PM »
Thx, - Bill, sounds like a good idea.
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Offline atchman2

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Re: All over the place
« Reply #6 on: October 01, 2009, 12:29:52 AM »
Sometimes it is us that needs to get warmed up!  I'm serious the first few shots I take everyday seem to always be off.  Then I get into a groove and it is fine.  

I dunno about getting warmed up, but it matters with tank guns on how warm the barrel is, the ambient temperature, even the temperature of the ammo!
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Offline North Pack

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Re: All over the place
« Reply #7 on: October 01, 2009, 01:34:58 AM »
I agree completely, - I like/have to see where the first two or three hit to be comfortable. When shooting my .22 powder burner, I always go through one clip to warm up the gun, and see if a tweak of the scope might be a good idea. ... Lately for some reason, I've been using my wrist to help my finger pull the trigger, only with an air gun though, not a powder burner - frustrating as all h*ll. ... The "extra help" almost NEVER helps, - pulls everything to the right.
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Offline atchman2

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Re: All over the place
« Reply #8 on: October 07, 2009, 12:03:14 AM »
A couple of things I've learned from shooting my POC Air Hawk.  

1) Always use either an open hand or your forearm for your left hand.  

2) Hold the right hand firm, but don't crush it.  

3) The thing that has helped me a lot is to watch your cheek pressure.  Don't lay your head on the stock.  At best it should barely touch.  I think the reason why is the gun moves back and then hits your cheek causing it to pitch to one side.  I'm not certain of this, but it really helps.  

4) Work on your trigger pulls.  You can easily pull a gun one way or the other with your trigger.  Concentrate on squeezing not yanking and put your finger in the same place every time.

When I was out in Kansas trying to shoot Prairie dogs, I'd just put the gun in the car and go.  However it always worked better to shoot the gun before going in the field just to confirm your zero.

I just went back and noticed you shoot from a BiPod.  That may be your issue.  Have you tried shooting it from say a table while sitting?  My Whisper can pretty much put every pellet in a small group at 20 yards.  I'd try some different things to see how this one shoots.  I'm not convinced that every gun is the same and they all have their foibles.
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Offline North Pack

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Re: All over the place
« Reply #9 on: October 07, 2009, 12:29:57 AM »
Been having the same problem with my Quest 800X ... scope and screws are fine, but there are a few "gray streaks" in the muzzle break , a Beeman - but it's tight. (It's definitely tight now)  ... Brake off center possible, - or something else???
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Offline N_Strike

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Re: All over the place
« Reply #10 on: October 07, 2009, 01:47:57 AM »
Hy,I've got the same problem with either my .22 Whisper and the .177 Shadow sport.Both were tuned(by me) and deadly accurate one day :D ,the next I had to rezeroing the scope :( (as gremlins would secretly move it!!!),I've searched  here and there and find out that most of the problems are related with Gamo's scopes (at least the ones originally fitted) so I changed the scope with 2  Leupolds and since then I had not a single problem anymore.
Hope this may help you.
Emi.

PS:My 2 rifles are both synthetic,later I've filled the empty stock with rags and it went even better. 8)
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Offline North Pack

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Re: All over the place
« Reply #11 on: October 07, 2009, 02:33:43 AM »
I just put on a new Leupold scope on last week, - no change. BTW, I never had a problem with my Whisper, installed a GRT-III trigger and it's a tack driver. ... Giving this some though, I might have the problem solved. I've installed this Beeman brake on two .17 cal rifles, with good results - the 800X is a .22 cal. ..."Maybe" this brake is a tad too small for the 800X, - some shots are right on, and the next 2-4 are anywhere from 1"-4" off. I may not qualify for the Olympics, but I'm not that bad, - well, not consistently. .... "Might" be a good idea to take this to a local machine shop and have them increase the dia about .050, - try to keep the pellet/brake opening relationship constant.
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Offline North Pack

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Re: All over the place
« Reply #12 on: October 07, 2009, 02:38:55 AM »
You hit the nail on the proverbial head here, - I have been putting to much "cheek" pressure on the stock. That plus I think I have a "muzzle brake" problem - hopefully solved.
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Offline rkr

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Re: All over the place
« Reply #13 on: October 07, 2009, 04:45:38 AM »
You can just drill it yourself. Here's some sizing information http://guns.connect.fi/gow/QA1.html
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If some is good and more is better - then too much is just right.
FWB-300SU, Drozd Blackbird, Gamo Hunter Sport, AR 1000, Crosman Nightstalker, ZC-4, Webley Tempest ...

Offline North Pack

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Re: All over the place
« Reply #14 on: October 07, 2009, 07:09:02 AM »
Thanks rkr, - too late I guess, I just dropped the brake off at a local shop, it will be ready tomorrow morning - $20.00.
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