I am building a new rifle chambered in a cartridge new to me. I expect certain bullets and powders to work well and am tempted to purchase a barrel’s worth of supplies because they are currently in stock. In the back of my mind I worry “what if” the barrel doesn’t like that bullet. Then I am storing a bunch of supplies I may never need. Bullets are my main concern as the powders that i expect to work I already have a healthy supply of.