The Wildcat 200 gr bullet according to my testing and the way I enter conditions into JBM and Exbal has a G1 BC of 0.82 and a G7 of 0.37. Using equations based upon shape measurements and sectional density I get similar BCs. I think the 0.9 BC is uncorrected for altitude and the input was sea level but the actual shooting was at 5K ft altitude. My use of BCs is to get a good fit out beyond 800 yards and I don't pay much attention to the fit at the closer ranges.
From Riight to Left
1. Fowler 90 gr match bullet 257 cal
2. Wildcat 130 gr hunting bullet 257 cal (two dead elk)
3. Wildcat 142 gr hunting bullet 257 cal
4 Nosler 160 gr Accubond 284 cal
5. Wildcat 200 gr HP RBBT 284 cal
6. Berger 155.5 Match 308 cal
The Rifle
Nesika M single shot action, Lilja 4 groove 34 inch barrel, DE 4 slot brake, Jewel trigger, Mac A-5 stock, Burris extreme rings, NF 8-32X-56mm scope with NP-R2 reticle
If you should get to seriously considering building one get in contact with me. The cartridge is extremely overbore and life is not a simple as the video makes it look. That's why all of my practice is with a 308 Win.