ArchAngelCD,
I used different load weights between the H-110 and W-296 because the data I have indicated those would be safe loads to start with.
Everybody who has read this post is missing the main gist of my experience.
Even though H-110 and W-296 are the same powders. IF YOU WANT TO SEE WHAT IS THE MOST ACCURATE POWDER FOR YOUR HANDGUN YOU MUST LOAD AS MANY POWDERS AS YOU CAN. Your results may vary from mine, your handgun may shoot one powder better than another.
But, when looking for the most accurate load for your weapon, to be truly satsified one should load as many powders as possible. My data proves that.
For years I shot only H-110 and Unique. I go tired of Unique being dirty and I wanted to find a powder that provided a better overall accuracy in all of my handguns. I settled on Bullseye. On the average it gave me the best overall accuracy with clean burning. BUT it still was not the most accurate for each and every handgun. I now have the time to "branch out" and try other powders. Every handgun I have shot so far in this approach [10 or so] has shown that it prefers one powder over the next. If I want the most accurate load for each handgun I need to have 10 powders available.
mkk41 states, "But YOU know better , huh?" My response: My data proves that in MY M27-2, one powder does exceptionally well with one bullet but on the next bullet it does not. I never said I knew better. I have said here that one must always be willing to experiment to find the most accurate load for each handgun. And it is obvious that even powders reputed to be the same can produce different accuracy levels. Even if the difference is attributable to lot variations. And it is obvious that the difference can be as much as three inches.
Paul5388 states, "To think there is wide variation is to fool yourself, but there will be minor amounts of variation." My response: Look again at my data, the difference between 4 1/4 inch groups and 1 1/4 inch groups at 25 yards is a big enough variation that I think I want to shoot the smaller grouping load.
n4zov...you already read about it so I guess you already wasted your time. And everybody else's because you had nothing constructive to add.
To add more; I have loaded only Bullseye and then swapped out different bullets until I found the most accurate load. However I have also found out that by staying with one bullet and swapping out powders I can find a more accurate load. But...if you again look at my data, if I had only chosen the Sierra 158 grain HP and loaded as I did I would be left the impression that my pistol does shoot well. And I know the Sierra 158 grain HP is a very accurate bullet in other handguns.
Therefore, if one has the time, and I realize, the money; he/she should experiment as much as possible with several bullest and powders to find the right load. And even if the powder companies, or a lot of reloading aficianados state two powders are exactly the same, I suggest you do the experimentation and see for yourself. In my case they are not the same.
To prove this further I should probably load H-110 and W-296 to maximum loads with the same bullet and components, then chronograph them. If they provide the essentially same ballistics then we have two powders that are the same. But since they provide different levels of accuracy, perhaps I might find out different.
So I have two more steps to take. Load to max on H-110 and W-296 and see what, if any, are the differences in velocity.
And then choose one of the two, or both powders, and load several different lots of each powder and see what the differences in accuracy are.
Stay tuned if you wish, and I will be back with that report in a few weeks.
Except you n4zov, I would not want to waste your time anymore.
Ya'll have a good night.