If that's not enough do it to the clear cover too. Note the pellet skirt ghost stains then use a sharpie to mark - color in where needs to be milled out.
Great idea. But put the bit in a drill press. The channel will be the same depth all the way around. If other pellets give you trouble after doing this try a o ring in the channel just take it out for pollys and slugs.
OR add a pair of springs to this make it plunger type and seat wedge magazine flush in a piece of wood before doing it. Can even use a standard drill for this project use springs and adjust to plunge max depth stop omit clear bottom shield to use as a router on stilts instead.
Oh from China anyway so buy HERE instead pay extra from a middleman probably workimg out of his garage if you don't wanna wait and not pay ACE Hardware overhead and franchise fees. MAKE OFFER OPTION see what he paid above.
He probably paid a lot less than $3.33 shipped buying in bulk to resell.