The Firing Line Forums - View Single Post - Slow-Burning powders for .40 S&W

WESHOOT2 · May 4, 2013, 05:30 AM

"Accuracy, and low flash?"

In no particular order, except the best choice first:

-3N37 (yes, Vihtavuori powders cost more)
-Silhouette (also can be WAP

)
-AA5

Suggest using 'Start' data with these choices and your bullet, and use .2g increments when working carefully upward.
Do NOT let you OAL get shorter than 1.115"; suggest start OAL of 1.125" minimum.
Sort 40 S&W cases for best accuracy; recommend Federal primers for accuracy development.

May 4, 2013, 05:30 AM	#8
WESHOOT2 Senior Member Join Date: February 20, 1999 Location: home on the range; Vermont (Caspian country) Posts: 14,324	hmmm....not guessing "Accuracy, and low flash?" In no particular order, except the best choice first: -3N37 (yes, Vihtavuori powders cost more) -Silhouette (also can be WAP ) -AA5 Suggest using 'Start' data with these choices and your bullet, and use .2g increments when working carefully upward. Do NOT let you OAL get shorter than 1.115"; suggest start OAL of 1.125" minimum. Sort 40 S&W cases for best accuracy; recommend Federal primers for accuracy development. __________________ . "all my ammo is mostly retired factory ammo"