IDK if this is the correct forum to post this, but what are the experiences of others shooting longer distance with cast and trying to follow a ballistics chart? I'm shooting a Lyman 457132 and working on reaching out a bit. Looking at the charts in the Lyman 3rd edition cast manual, it shows a BC of .384 and a drop of about 96 inches from 300 to 400 yards with a MV of 1200 fps. I've seen more current publications saying that bullet has a BC of .402. Plugging that into a calculator shows a drop at the same distances of 70 inches. Finally getting sighted in had a true bullet drop of 116 inches, which is closer to the old data. I know the BC is not an exact science and other conditions can affect bullet drop too. I'm loading a starting load of 4755. The temp is 20F and humidity is low. The square root of 4 = 2. Am I over thinking things? The bottom line is the BC is probably closer to the older data. What are others experiences?