I would agree with Steelhead and add that I like the 1916 because you can tune the arrow by using a steel adapter for more weight, aluminum for less, and still play with string size and/or dacron v. non-stretch (FFL). You might order a test kit from 3Rivers to validate your choice.
Here is the 3River spine chart: read from Alu, 41 - 45#and across to 26" - 28" for 1816 @ 26" or 1916 for 27 - 28".
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.3riversarchery.com/pdf/ArrowCharts.pdf