jonniereb
07-26-2011, 02:41 PM
I remember seeing on the bulletin board several years ago a formula for determining how far to raise your rear sight at 100 yards on a musket sighted for 50 yards. I wish I had printed it off then! Does anyone know what I'm referring to? I ask because someone gave me a trick to use for raising the rear sight if you don't need to go up a whole step on your factory sight. They suggested using a set of spark plug gap measurement tools as shims. So I got a set that came on a keychain so I could remove them individually. Problem is, I don't know which thickness to use. Then I remembered reading about that formula from way back.
Sooooo... if I'm sighted in at a dead center hold at 50 yards, and I shoot 40 grains of 3F with a Rapine ashcan sized to .576, and wind and light and all other variables being equal, and Train A leaves Chicago traveling 48 miles per hour, how far do I need to raise my rear sight (in thousandths of an inch) for a dead center hold at 100 yards?????
Thanks in advance...
Sooooo... if I'm sighted in at a dead center hold at 50 yards, and I shoot 40 grains of 3F with a Rapine ashcan sized to .576, and wind and light and all other variables being equal, and Train A leaves Chicago traveling 48 miles per hour, how far do I need to raise my rear sight (in thousandths of an inch) for a dead center hold at 100 yards?????
Thanks in advance...