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Old April 9, 2007, 12:37 AM   #18
mc223
Senior Member
 
Join Date: January 20, 2007
Location: n/w Wisconsin
Posts: 365
Some of the benchrest community have been blending powders for years and in some cases with very good result.
The following is an excerpt from another forum. The author is unknown. The testing is well thought out. As are the potential problems.

You would need to have a good understanding of your desired end result and weigh that against what is already available. Your end result very likely already exists.
Kernal size would need to be very similar to avoid the settling of one from the other. Also burn rates would need to be similar. Mixing would need to be very thorough.
Blending could be a very hazardous proposition if not done with good sense. Both powders would need to be tested and chronographed. A good understanding of each powder is necessary to theorize what the blend should deliver. Testing of the blend should be very predictable, based on collected data of the individual powders.



Quote:
I started about a month or so ago blending N135 and Varget for my 30x47. I was using 41.8 grs. of N-135 or 43.9 grs. of Varget. Now I use 42.8 grs. of this blend. the reason for this was because the N-135 would increase in velosity as much as 40 to 50 fps from a temp change from 65 degrees to 85 degrees and The x count would not be there shooting score matches. By adding this blend of Varget Xtreme non temp sensitive powder I found that my velocity's are only variying about 20fps in this same temp variance and that my x count is as good as it was when I used straight N-135 on a day that powder and temp matched. and on the same note the N-135 was not filling my case as I would like it and the Varget was like a compressed load. now with 42.8 grs I get good case capacity and a velocity varaince that does not seem to affect the accuracy as much. and as far as being dangerous I can go as much 43 grs of N-135 or 45 grs of Varget, and since I'm using 42.8 grs of blend even if I would dump all of one kind or the other it would not be over the max load anyway. And by the way I get a good blend when I only do 250 grs. of each at a time

Last edited by mc223; April 9, 2007 at 01:11 AM.
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