Finally went shooting

[flintboomer]

One thing I can tell you is that humidity will change your load/point of impact. Here in Colorado the humidity is usually quite low and on a rainy or humid day my charge has to be raised by 20-25% or it will always strike low.

[William]

One thing I can tell you is that humidity will change your load/point of impact. Here in Colorado the humidity is usually quite low and on a rainy or humid day my charge has to be raised by 20-25% or it will always strike low.

I think that's the best explaination I've heard so far.  The heat index due to the humidity that day was well over 105.

[William]

Took my .54 out again a few days ago and set my target at 40 yards.  I changed to a thicker patch, this time using .020 and the results seemed more consistent although I used pillow ticking for one shot only that grouped within the same area.  Although the .020 patches are pre-lubed and cut I have added more olive oil to my mix as it wasn't soaking into pillow ticking material that I have in reserve. 

First three shots;

Next three;

[gordy]

        William , I don't think there is any doubt that the heat/humiddty combo caused your POI and the lessor performance of the BP load! Bill Knight (yes the same)  has over the years tested and researched the many factors that  can and wil;l affect BP performance  . If there was anything that could , might , may affect BP however slightly or remotly he tested it . The one thing that seemed to be consistent and predictable was the effect of heat and humidity If I can ever find the hard copys of his reports I'll post them.