u/ICanSeeYourPixels2

https://imgur.com/a/LsCQGEl

I have been working on developing 45-70 loads, and am fighting unburnt powder as I work up both a sub and a full power load.

Primarily I am fighting a 405 polymer coated lead bullet using trail boss. I am at 13.5gr, ~1050fps and am seeing a lot of unburnt powder down the pipe.

Similarly on a 500gr slug with IMR4198, I am just starting out at the min load of 28.5gr ~1050fps and am seeing the same thing.

Any advice is greatly appreciated. Thanks!