I see this mentioned in the 650 manual on page 41 of the trouble shooting section and it says "(see conversion chart for which cal. require use of the casefeed baffle)"

I'm not seeing which cases require the use of it in the caliber conversion shots.  I"m not seeing the part listed on the Casefeed Assembly diagram on page 55 either.

So which calibers require the use of this adapter besides 380 and 9mm?