You can make your own short starter...I used a hickory rod a and a wooden handle (like from Hobby Lobby)...Drill a hole through the handle, insert the rod, glue, then when dry, drill a hole through the handle, through the rod and pin with a nail...

For a "flask"...years ago I would use a 10 oz container that contact solution came in...You can use 35mm film canisters for quick loads...And can fashion a measurer from modern cartridges...

What rifle did you buy??? What caliber???