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Andy, If it was me Mr. White would be my best new friend. :) Ken

Not sure I follow; I see energy losses as the variable (operations) in the equation and start temperature (powder) as the coefficient. Ken

Flying into Winnipeg Saturday morning enroute to Red Lake; sure glad I didn’t rent a car. Ken

Actually not so bad, what’s left of the white powder has turned black along with some green spots. :) Take Care. Ken

Geez or maybe gees Francis and just when I was going to bring up the rheology of powder with things like spartial arrangements and interparticle forces. Ken

Like I say you can not generalize; 100/200 yds. is not 1K and similarities are few. As to credibility, I am not sure how many group shoots you have been to but throwing is the norm; and I have no doubt of VihtaVuori’s testing. If you re-read the quote, you will see that they say with a less...

I think that most 100 / 200 yds Benchrest shooters on these forums acknowledge that with internal ballistics, using generalizations does not work. Because of that most are careful where they resource information. Here is a quote from a credible source: “In shooting tests it has been...

Al, I do not doubt your testing results or that lower ES are not beneficial; I am saying that the information supports your test results. I shoot score and group; for score I preload and I am acutely aware of the advantages of doing so. H4198 in this case permits me to do so. I would like to...

Volume is my friend Al, it’s powder it is all about bulk density. You cannot wish volume away. :) “A bulky powder (occupies more powder space) measures more uniformly, because normal variation in the measured volume represents a smaller percentage of the charge weight.” (Ed Harris) Ken

Boyd, Real solid post I like it. I think the premium’s you mention are actually quite high when looked at from an internal ballistic view rather than one solely based on velocity, short range / long range (sorry if I miss read your post); mostly attributed to by the chamber pressure at a...

Presumption denied :) Ken

The little I have learned about reading numbers is that the answers are not of all that much value if you are not asking the right questions or using fuzzy data. I am just a novice at this game; so please bear with me. Let’s says I live in the east and I want to go to a four day group shoot...

Variations from round to round. Linear Burn rates (for a given weight and composition) are determined mostly by the powders grain size and geometry however; the powders Initial Burn Rates are mostly about how easily the powders coating is ignited. Certain coatings are harder to ignite than...

Al, I respect your opinion however I am not convinced that even with the use of near standard reference conditions and the very best of lab scales (2X’s) that powders that meter best are necessarily the powders that have the single greatest affect on the pressure – velocity relationship. But...

Boyd, I am curious as to what the actual composition is; do you have any info? Both the Western Powders and the IMR MSDS hold very little information. A bit like apples and oranges (2015 and 133); I am quite doubtful that even if they weighed the same, that they have the same composition...

Norm was one of the good guy’s. I always enjoyed our conversations; fair and open with all. Sorry I missed him in Vermont. My deepest condolences to all the family. Ken

Not wanting to be argumentative here but this may or may not be totally accurate. It is my understanding that this new powder has a granulation with a length to diameter ratio close to one. To me this translates into a more reproducible throw and a higher apparent density with the advantage...

Look at it more as - weight of a given volume. The burn itself is volumetric. Ken

Duration And, it is in that time that the bullet is subjected to its highest upsetting forces. (perpendicular to bore) Ken

Charles; I agree on the burn rates but, would you clarify your statement please: I am not sure what you are saying exactly. Thanks Ken