I use these patchworm kits almost exclusively and they're brilliant.
https://www.amazon.com/Air-Venturi-PatchWorm-Multi-Caliber-Cleaning/dp/B07ZDN25TT/ref=mp_s_a_1_1?dchild=1&keywords=patchworm&qid=1591284392&sprefix=Patchworm&sr=8-1