Lyman Double Cavity Rifle Cast Bullet Mould producing bullet #225438, a .225" nominal diameter, 44 grain Round Nose Gas Check bullet. Designed by Guy Loverin for the 22 Hornet. Closely resembles the 22 Long Rifle bullet in shape. Uses Lyman top punch #438. Approximate Bullet Dimensions: Bullet Length-0.51", Bottom of Crimp Groove to Bullet Nose-0.28".