A big bore slug. To get a handle on nomenclature, the definition of “big bore air rifle” for the purpose of this article ... Most of the guns run at pressures of 3000 psi to 4300 psi and, depending on ...

An important factor to understand, is that the caliber is only one element contributing to the power an air rifle can generate. A .50 caliber slug in one rifle design may generate 250 fpe, but that ...