Hello all,Thank you so much for your replies!Don and Bullit, thank you for the advise on the rifling hold. I think both of you are right, I have been squeezing the neck too hard, oops!!! Bullit, I really appreciate the video you shared. I am going to try this hold tomorrow and see the results. I cleaned the barrel last week with the Gamo cleaning kit. Should I have use some synthetic oil to lubricate the inside of the barrel? I have not performed the tissue test, I will do that tomorrow. In the mean time I did experiment with some of the earlier suggestions on distance and sighting. I performed 4 tests this time I performed them with one pellet, Gamo magnum, and the results where partially satisfactory.