I am going to buy my first "small rifle", lol.. I have all big bores now..

I kinda fell for a Remington 700 Varmint SF thumbhole gun in 22-250.. They also made one called VLSF II I believe.. BUT, can't find one anywhere.. So first off if anyone knows where one is please let me know.. They were a thumbhole, vented stock with a fluted stainless bbl...

I did find one in 223 but I'm not so sure on that caliber quite yet.

So my question is... 223 or 22-250? I'm sure this one has been beat to death so I'm sorry..

More important is my knowledge of twist rates in small bores.. All the guns I've researched so far have a 14" twist rate in 22-250 and a 12" twist rate in 223rem.. i.e., Remington, Howa and Browning.. I seen that Savage offers 223 in a 9" twist and 22-250 in 12" twist..

What twist rate should one be looking for in either caliber? I know the faster the twist the heavier bullet that can be shot but is there a happy medium... Is 12" for 223 and 14" for 22-250 to slow of a twist rate?

Any replies are appreciated.