I've been reloading shotshells and centerfire for 15 years, but I'm new to the 16 ga. So far I'd say the biggest challenge has been learning which 16ga components work well together and which ones don't. Lots of nuance in the 16. The old 16 gauge Society forum has been extremely helpful, but I found it too late to join. When I discovered that many had migrated to this website, I couldn't sign up fast enough. I just downloaded the data above, thanks to everyone who has worked to put this together.
Charlie16ga, I'd love to see the data you have if you don't mind sharing. I tried to PM you but I don't have sufficient privileges on this site yet, and not sure how many posts that takes.