Rio 12 Gauge "00" Buckshot for your trusty room broom is available for $2.95 a 5-round box. We know ole' Joe, wants us to use bird shot, but think of it as shot for a really big bird if that helps. Hurl nine pellets at about 1200fps and enjoy a manageable recoil thanks to a lower pressure load. It cycled just fine in our Wilson Combat SBS and pump guns.
https://agsarmament.com/royal-12g-00-buckshot-low-recoil-5rd-box
https://agsarmament.com/royal-12g-00-buckshot-low-recoil-5rd-box