I'm out. When I realized we had leftover, I had my better half sew up another bag (medium) to use up the excess. You were using that bag ....
https://www.amazon.com/Polypropylene...polyfill+beads
Last time I used play sand from Lowes, but next time (I can't find my damn rear bag...) I will use the beads.
I had one of those round bags they advise for bench shooting things with heavy recoil (I was using it for 12g slugs) and I filled one with #9 shot. When shot got close to $50 I dumped it back out and loaded with it.
Years ago all I had was a few old socks and airsoft BBs , it works.