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300 blackout case feeder plate

Hey what size case feeder plate would I use in my case feeder for 300 blackout?

I use the large pistol plate with two spacer washers underneath the clutch. This required getting longer screws, which I picked up at Ace hardware when I bought a second washer.

If your case feeder has a fixed opening size in the bowl where cases fall out, use a pistol case feed plate with 2 washers.
If your case feeder has an adjustable sized opening, use the small rifle plate, and reduce the opening size as per the case feeder instructions

How would one know if their case feeder mouth was adjustable...just looking at it I would say no, but then again I never thought about using two washers on the clutch either...lol. And of course I have small rifle plate, large rifle, and small pistol plates! Doh! I’m new to making changes to my 650, I set it up a few years ago to do .223 only, and used my 550 for 9mm...everything else which isn’t much just a couple three calibers I do on my old single stage...

The case feeder was redesigned the beginning of 2018 to allow the metal cuff to be adjustable. It has a thumbscrew you loosen to slide the port cuff, with a selection of notches to move the cuff into.

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