Thats why a real powder baffel makes a difference. The last .75" inch under the baffel never gets compacted by the powder above it. Its still important to settle powders and opperate the press consistently. If you load fast then move the handle the same when you throw test loads. It's not a huge difference but it's important to be consistent. For me the biggest problem was if you have a stoppage like a case that hits the sizing die off center. The powder will get jostled badly and the throw will not be the same.
Ignore Text Size....posting from a phone.