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Have downloaded the video to watch when I have more time. Thanks

Once the Chrono arrives from this forum and the blasted wind dies away I can test my loads and see how close the speed is to what GRT says. Getting my head around it with a little bit of help and...

Thanks everyone especially Steelisreal for explaing things in detail.

I had just gone with the std settings for cartridge ect but now you have explained things hopefully I can input my actual data.

Just having a play with this and have a couple of questions.


Under projectile it asks for two diameters if selecting a boat tail, obviously one is the calibre but what is the other measurement?...