Surfing I found this very interesting wildcat. using a .224 diameter bullet and 7 SAUM case.
75 gr JLK at 3970 fps or so.
Part 1.
https://forum.accurateshooter.com/threads/gentlemen-i-present-the-220-redline.3934327/
Part 2.
https://coyotestuff.com/the-220-redline-lives/
75 gr JLK at 3970 fps or so.
Part 1.
https://forum.accurateshooter.com/threads/gentlemen-i-present-the-220-redline.3934327/
Part 2.
https://coyotestuff.com/the-220-redline-lives/