Changing POI

stovepipe699

Regular
Rating - 97.7%
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Location
Stead, MB
After doing some shooting with my Slavia 634 I noticed my point of impact goes up after I shoot for a bit. I'll do some shooting, get the sight set, and then when I take it out next time it'll be shooting a good inch low. After a number (6-8) shots the POI will go up. Is this normal on an air gun? Could my sloppy oil job on the piston be to blame? I didn't think an air gun barrel would get "hot" from repeated shots. What the heck!
 
Your not supposed to use oil in the piston of a springer unless it has a leather seal and then only a couple drops about every tin of pellets or so.AFIK
I don't get any verticle stings when my rifle is working properly right from the start. How old is your model and how much has it been shot.
 
New, shot very little. I heard the piston was usually pretty dry on these, so I oiled it. I didn't know oil was bad, I'll have to tear it down and clean it and use the proper stuff. What are you supposed to use?
 
I did some google searching. I put the oil on the spring, so very little should have made it's way past the seal into the chamber. If you put petroleum based oil in the chamber it can explode an damage the gun. I'll get some silicon chamber oil for it next time I hit the store.
 
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