Thread: BACK YARD RABBITS

I assume the scope is OK and all the bolts are tight. Add some loktite if they regularly loosen.
The barrel pivot bolt shouldn't be too tight or too loose. If it is one of either you will usually get vertical stringing.
Clean the barrel. Check whether your barrel crown is not damaged. If it is only shot with airstripper it is probably unlikely. Also test your grouping without the stripper.
Damaged breech seal or piston seal could also be a reason. If you have a chrony shoot a shotstring and check muzzle velocity spread. Should be like within plusminus 4-5 m/s, otherwise there is a problem.
Study the artillery hold like mentioned previously. Never support your springer on a hard surface and always support it consistently.
If all is OK, start with some JSB pellets. They are usually among the best grouping pellets in most air rifles.
Set your scope parallax at the testing distance to avoid parallax error when determining accuracy.
All this should cover most causes for inaccuracy of your airrifle.

PS your last results are really good!