In the late 60's I tried 22 pellets with a primer in a Savage 219 22 Hornet. I did have some problems with pellets blowing out at the nose. As an unguided 16 year old, I went back to the 225415 which shot 1.25" regularly. A different pellet or small pistol primer might work, but check the bore every shot until you are sure of your pellet/primer combo.