There is no free lunch in ballistics. The .223 MKV is an infamous "barrel burner."
Because you are shoving 25-30% more powder through a .224" hole, throat erosion is aggressive. 223 mkv
You will replace your barrel as often as you replace your scope batteries. Additionally, the MKV requires frequent bore cleaning to remove copper fouling, which becomes extreme at these velocities. There is no free lunch in ballistics
Certain unlimited benchrest classes allow wildcat cartridges. The .223 MKV's low recoil (less than .243 Winchester) combined with high velocity allows shooters to spot their own hits. However, barrel life is a major concern (see below). You will replace your barrel as often as
Some tactical shooters use .223 MKV as a low-cost (relatively) trainer for magnum calibers. Recoil is minimal, but the wind-reading challenges at 800 yards mimic those of a .308 Win at 1,000 yards.
If you're looking to generate or convert a video to an MKV file with specific settings: