.... but if you measure your BC at an average velocity of Mach 0.9 (about 1000 fps, where the drag is less than the G1) and then calculate it using the G1 model, you may get a higher value than what you would see at lower velocities.... We see this in the testing for H.A.M., where they are getting lower BC(G1)'s than the manufacturers are claiming because they are testing at under 900 fps.... The manufacturers are typically testing at higher velocities, and then calculating their BC using the G1 model, which gives a higher BC(G1).... As the slug slows down at long range, it likely doesn't live up to the claim.... Bob
The first software I know of which incorporates the drag law can be found here. https://gpc.fotosoft.co.uk/Home.html There are android and PC versions I believe.Please remember this is a very initial attempt at a suitable drag law which will undoubtedly change as more information becomes available.The big Doppler radar (made in the USA) I used to use had over a kilowatt of power and could track a shell to 60+km. 50 cal bullets could be tracked to 6+km where they splashed down. The smallest bullet was a 4.6mm which again it tracked to splash at about 2.5km.
🔵 Miles, your link to G P Conway's ballistic apps* is very -- no, it's extremely helpful!! I had no idea his apps existed.And it seems like he's been working with you on this -- as your revised GA2 and slug drag models are also included. So helpful! Well designed. Even maximum range at angled shots is included, great tool. Basically a lot of ChairGun's functions -- but now usable on my cell phone in my pocket! And with much better precision than the ChairGun mobile version that had been "dumbed down" from the PC version. THANK YOU! *https://gpc.fotosoft.co.uk/Home.html
Which app has the BC calculations?....Bob