The M24 contour is about the same as a Sendero/VSSF II contour, .680"ish at the muzzle?
I really don't have an issue with feeding from the magazine, but I always polish the feed lips on Rem rifles as I have always found them sharper than I like.
In the comps here, you can only run a case from the follower into the chamber, it is not allowed to have a cartridge in the magazine, I understand your discipline is different, but the only thing this rifle is used for outside of comps is for spotlighting from a dedicated pickup with shooting racks/rests atop the roof. Then, I only use the standard factory barrel in 22-250 for this.
Cheers.