The first .22 hornets were converted from .22 rimfire...The springfield .22 rimfire. The Remington 580 series rifles can be converted, and a cv bolt head is available from the folks that make the 5mm rf magnum to cf. conversion. The rifle should be able to take hornet pressures. The Martini actions in .22 rf. make great little hornets, but most .22 rimfire actions are not capable of standing hornet