air rifle scope issue

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I doubt the scope has anything to do with it.

Are you using Real Air-Rifle oil on the piston?

Are you getting "dieseling" pop & smoke from using too much, or the wrong oil?

The thing is, when the gun is cold, the oil is thicker, the compressed air is colder, and between the two, doesn't provide as much pressure.

Once everything gets up to operating temperature for the existing weather conditions, things are bound to settle down and fly right.

rc
 
I don't think it is the scope also, posted my thoughts wrong.
Yes, air gun oil.
Been repairing air guns for 20+ years.
No dieseling.
Remington NPSS, .22, tore it down when new to fix scratching, grating, issues that plague this model.
It is nasty accurate when warmed up.
But as a varmint gun the first shot is what counts.

As a side note, my RWS 34 is a better, smoother shooter.
Though I have rebuilt and tuned it with better parts and lubes.
Been using it for 15 years now.
It's no slouch on the power side also.
.22's beat .177 at distance, just took some time to find out.
 
Suppose you shoot one shot on a target today from the cold barrel.
And another one tomorrow.
And another the day after that.

Would all three be in the same tiny group?
Or scattered all over?

rc
 
Interesting question.
From previous experience they are scattered.
But have not done a "test" for that thought.
Will do it and take note over the next several days.
 
In what position do you store the gun?

I've heard that springers tend do best when stored more or less horizontally--as in a gun-rack--instead of vertically, resting on the buttpad. Seems like the recommendation was to store them horizontally with the sights down. The idea was that storing them vertically caused any lubrication in the piston chamber to collect on one end or the other which could cause velocity changes until the motion of the piston redistributed the lubrication more uniformly.

I've never tested the hypothesis, but changing the orientation of the gun while it's in storage might be worth a try if nothing else pans out.
 
Is scope built specifically for air rifles?

Forward recoil of springer air rifles can be brutal, many a good scope for high powered rifles have been ruined by springers..
 
Found the likely answer.
Talking with a dealer/tech. at a gunshow.
He was telling me the velocity of the gas piston has a tendency to burn out the piston seal.
Makes sense, I need to re-oil the chamber after only 300 rounds now instead of the much higher round count it used to be.
I can feel and hear the gun change as the chamber gets dry.
So I will be getting a new seal and see if he is right.
I bought 2000 pellets with the gun plus using what I had on hand gives a 2500 rounds shoot over 6 months,( I live in the country)
Have been using RWS chamber oil.
 
Why would it become more accurate as you progress into the shooting session if the seal is shot?

How much oil are you adding when you oil the chamber?
 
Maybe the seal warms up and takes a seat.

Only a drop or so of oil of course.
I fit a small straw for a Brake Cleen spray can into the end of my chamber lube bottle.
I squeeze to bottle and get the length of time for a drop or two to come out then put the straw bottle/straw into the chamber without changing squeeze pressure and pull out after a drop or so should have dropped.
 
Did the gun ever shoot satisfactorily or is this how it has always behaved?

If it's always been like this, it's starting to sound more like the seal is a poor design or the seal material wasn't chosen well.
 
If this is a spring-piston air rifle, your hold may have a surprising amount to do with this zeroing problem; unlike most firearms, a spring-piston air rifle has to be able to consistently recoil in BOTH directions, not just one, otherwise you're going to get different POIs with each shot. Most accurate spring-piston shooters use an "artillery hold", where their forward hand doesn't grip the forearm at all, it just supports the rifle and allows it to move back and forth as it needs to.
 
SDC, yes I know all the issues holding and shooting break barrels.
Though this is a gas piston the rules still apply.
I have errant rounds when I first start shooting then the group gets tighter as the gun warms up, so to speak.

JohnKSa, the gun used to shoot great, little by little it got worse.
Did not think about it at first, but the last time I used it fired 15-20 rounds and gave up.

Have been shooting the high performance springers for 25+ years and shot, repaired, improved Chinese guns for even longer.

New piston seals should be here the first week of October, will give an update then.
 
Is scope built specifically for air rifles?

Forward recoil of springer air rifles can be brutal, many a good scope for high powered rifles have been ruined by springers..
Click to expand...

I had an RWS 36 for many years. When I first got it, I was using non-airgun specific scopes and rings, and had constant problems with my scope losing zero.

Once I got a Bushnell Airgun 3-9x40 scope and a solid 1 piece mount from RWS I never lost zero again.

Also, make sure that you never rest on a solid, hard surface. You need sandbags, a backpack, or your hands inbetween the stock and whatever you're using for a rest.
 
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