Now James do not get your panties in a bunch, sure the the .224 Plummer is a fantastic cartridge but you do not have to throw out your rifle. 22-250 is a good caliber and since you do not apparently hand load or know how to work up loads stick with it. For out of the box chuck popping not much beats it other then the .220 Swift. If you ever get into loading and load development you can always rechamber the .22-250 for the Plummer, or the Middlestead, or the A.I. or a bunch more.
For the shooter that does not get into playing around with reloading there is little better then the .22-250 when you take into account ammo availibility and such.