NCsmitty
Member
I've heard that at low charges, 2400 can leave unburnt powder and burns dirty. Have you guys found this to be true?
Absolutely, if you go less than 15 gr. of 2400, you'll have unburned granules in your barrel and less than consistent ignition, regardless of the primers used. Now I know this thread was about using your stock of 2400, but the criteria that you list makes it a less than desirable choice.
There are many powders better suited for your application and my choice would be Alliant's Unique. 8gr of Unique should get you close to 1000fps with a 240 gr cast bullet. Alliant's site list 7gr good for around 900fps under a 240 cast.
NCsmitty