I've found 15 grains of WW 296 to be minimum. Any lighter and they may not cycle. And that's the only powder I use for them I prefer 15.1- 15.2 with 110 grain zero plated bullets. And make sure the cases are trimmed to down to trim length. for me that's the biggest fail to fire. And I've found the Aquila may be a bit light to cycle properly.