I agree with everyone else that 22 Hornet is a no no.The simplest conversion is to 32 colt, but this is not usually accurate. 32RF had an outside lubricated,heeled bullet.The original 32colt did also, but this was changed to an undersized bullet and this is all that is avaliable now.The best solution is to rechamber to 32S&W, which has the correct diameter bullet.
Mike