16.ga.com was the go to site for 16 loading information. Death and time may have changed that. Try them first. They had a spreadsheet of hundreds of tested loads for the 16.
In 1990 I began, with the help of several other people, to develop a comprehensive Excel spreadsheet of attributed 16 ga. loads. It has about 1000 loads currently and I offer it for free if contacted with an e-mail address to send it to.
When the 16 gauge group was being formed I sent this list of loads to Russ Gray and that, I believe, was the genesis of the various lists going around now. I hoped to do my small part to keep those nice old guns shooting.
If want the list, PM me with your e-mail and I'll send it along.
