[JiminCA]

I don't have any experience with 340 - but I've found that when I had unburned powder granules and soot in the gun it was usually due to a light crimp. On light loads especially you need to build a little pressure in the case for the charge to burn efficiently. So check your crimp.

 

[John Forsyth]

The VV N340 is going to be a lot slower burning than your W231. I have found that VV N320 and W231 are similar in weight required and velocity. I am using N310 and N320 in .45's and like it very much. Both burn clean for me.

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John

"And by the way, Mr. Speaker, The Second Amendment is not for killing ducks and leaving Huey and Dewey and Louie without an aunt and uncle. It is for hunting politicians like (in) Grozney and in 1776, when they take your independence away".
Robert K. Dornen, U.S. Congressman. 1995