I would be interested in seeing a change to these FRA's. However, changing the rules from what is currently in place to allowing straight wall cartriges doesn't help me.
I primarily hunt coyotes with .223 and .22-250. I prefer shooting in semi-residential areas with these calibers than I would with a .44 mag rifle or a .357 rifle. Those rifles shoot slow, have lots of drop (more likely to miss), and that big slow projectile is going to tend to ricochet (or over-penetrate through the animal) and continue traveling much further, where my high-speed .22 bullets will disintegrate on contact.
For the sake of supporting all hunters and keeping the rules simple. I'd propose getting rid of the restricted area all together, and point out that all hunters are required to complete a hunter's safety course prior to getting a hunting license. Part of that training is that we only take safe shots. Leave it to the individual hunter to determine what is a safe caliber to use for their specific location.