A bit unsure where to put this post so stuffing it in here. Moderators please move it if it's unsuitable. Maybe t should've been in the Varmint section as this is more appliccable to hunting than stationary target shooting.
Anyway, I have been logging my new rifle for some time now and tracked how the weather changes to POI. These notes have been put in to a system so I can shoot more accurately in changing weather.
This card is my solution to changing weather/ correcting for comeups. This picture isn't mine, but I made the card. It corrects for changing weather variables. I don't use Density Altitude as I need to track ammunition temperature/ V0 anyway, so I might as well work with temperature and airpressure separated as opposed to the amalgated Density Altitude number.
A computer enthusiast has automated most of the card now making data export from the ballistic programs quite easy. I just haven't fully explored this option yet.
In this film Blog 19: Using weather data this data is used to correct a changning POI to shoot impact centre. The distances are not spectacular and the weather isn't very challenging. In the previous blogs the rifle is shot withoug making the corrections, just logging the changes.
The second half (6,5x284 barrel) is shot using a theoretical calculation using free online ballistic calculators. I used programs from the Berger and Lapua website, the JBM and PCB. They all give the same output, but varies slightly in user interface. I tend to stick with the PCB, JBM and Lapua programs as they are better for the metrically inclined. But they all work beautifully as the film shows.
The films also shows practical use of a weather instrument such as the Kestrel.
Hope this was of some help
Anyway, I have been logging my new rifle for some time now and tracked how the weather changes to POI. These notes have been put in to a system so I can shoot more accurately in changing weather.
This card is my solution to changing weather/ correcting for comeups. This picture isn't mine, but I made the card. It corrects for changing weather variables. I don't use Density Altitude as I need to track ammunition temperature/ V0 anyway, so I might as well work with temperature and airpressure separated as opposed to the amalgated Density Altitude number.
A computer enthusiast has automated most of the card now making data export from the ballistic programs quite easy. I just haven't fully explored this option yet.
In this film Blog 19: Using weather data this data is used to correct a changning POI to shoot impact centre. The distances are not spectacular and the weather isn't very challenging. In the previous blogs the rifle is shot withoug making the corrections, just logging the changes.
The second half (6,5x284 barrel) is shot using a theoretical calculation using free online ballistic calculators. I used programs from the Berger and Lapua website, the JBM and PCB. They all give the same output, but varies slightly in user interface. I tend to stick with the PCB, JBM and Lapua programs as they are better for the metrically inclined. But they all work beautifully as the film shows.
The films also shows practical use of a weather instrument such as the Kestrel.
Hope this was of some help
