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Just off the top of my head
I'm not sure that you have all the variables, or set them up adequately.
For one thing, I think you would be better off working with the slide weight, rather than the weight of the whole gun.
Also, the buring rate of the powder probably makes some difference, even though the power factor is the same with two different powders and the same bullet.
And, without thinking about it very carefully, I am suspecting that different bullet weights will have an effect on slide velocity, as well, even though they are loaded to the same power factor.
Hopefully, somebody who has thought about it more carefully will respond and teach us both something.
SL1
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