Aguila Blanca
Staff
Does anyone know what the relationship is between the inside diameter of a sizing die and the desired outside diameter of the case?
I'm ruminating on possibly trying to make a resizing die for .22 LR. It should be easy, since the case is cylindrical -- no taper. All I have to do is drill a hole, but ... how big should the hole be?
Initially I was thinking that if the SAAMI range for the .22 LR case is .222 - .226 (SAAMI spec is .226 - .004) and I wanted to aim for a resized case diameter of .225", I should allow .001" clearance and bore the die to .226". Then I remembered that brass probably springs back a bit after resizing, so the hole in the die might need to be the same dimension as the desired end result .. or maybe even slightly smaller?
Does anyone know?
I'm ruminating on possibly trying to make a resizing die for .22 LR. It should be easy, since the case is cylindrical -- no taper. All I have to do is drill a hole, but ... how big should the hole be?
Initially I was thinking that if the SAAMI range for the .22 LR case is .222 - .226 (SAAMI spec is .226 - .004) and I wanted to aim for a resized case diameter of .225", I should allow .001" clearance and bore the die to .226". Then I remembered that brass probably springs back a bit after resizing, so the hole in the die might need to be the same dimension as the desired end result .. or maybe even slightly smaller?
Does anyone know?