How about a .45 auto RN with Gas Check?

I would like to see a .45 bullet with a gas check to be used in the .45 Win Mag.
Round nose would be great, and 230-250 gn weight. It should do to add a GC shank to the H&G 34 style bullet I guess.
Otherwise an upscale of the “slippery 9” would be a good start. Could be made an RG as well for max performance loads.