IMHO ~
Reasons for you to SELL your .223:
1) your .243 can do EVERYTHING the .223 can and a little more
2) your a handloader so, cost of accurate ammo isn't much to you, yes it requires ALOT of work, but hey, the shooting sport always requires 2 things (money and time)
3) I assume you don't go through 200 rounds a week, cause if you do, even .223 wolf woun't save you, they are about $3.5 a box , thats $35 a week, almost 130 a month, yeh, your better off getting .22 LR or .22 win mag IF AND ONLY IF you shoot A LOT
4) And regarding you down-sizing your grain selection for .243, why ? stick to one load, I would suggest 90-100 grain load, and load the heck out of it for EVERYTHING, pdog to white tail deer that way you don't have to worry about re-zeroing your rifle everytime. Plus the 55-70 grainers are too fast for your barrel.
5) Ahhhhh Imagine how much less your wife and / or girlfriend will complain when you get ride of that one extra rifle
