Lyman listed loads using WSF as did Winchester back when it first came out. A couple years later, Winchester pulled their data a couple years later after further testing showed unpredictable and high pressure spikes. Lyman left their data in subsequent printings.
I used WSF for 28 ga until I learned Winchester pulled the data. If the manufacturer found iserious issue with their own components and pulled the data, I figure it would be unwise to ignore them.
That jogs my 70 year + memory. I now recall the pressure variation and unexpected spike dilemma. Will stick with 20/28, etc. Thank you!
