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Sorry I'm starting off bad by asking about a lot of things. Hope you can hang with me I'm sure there is reasons for what you do. You guys seem to rely on COL alot. I don't worry about COL. Bullets especially today with the ballistic tips can vary substantially in length. I use bullet ogive. The ogive is what I always want to be in the same place. I want the bullet the same distance from the lands every time. Am I wrong in my thinking. Or do we just look at the same thing in different ways.
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COL really means nothing because of the many different throat lengths in various guns. Always measure your distance to lands accurately for each different bullet you use. The Hornady base to ogive gauge gives you a good reference point