Hogbuster
Good luck. Chances are pretty good that the Savage 340 has a 1-14" twist, if so it may not like the extra length of the all copper X because the bullet MAY not stabilize in that twist. My .222's (Sako Vixen Sporter, Rem 700 V) are only OK accurate with regular 55's, being morte accurate with the shorter lead tip 55's over the longer B-Tip or A-Max. Your Savage may shoot OK, but be wary if your shots tend to pattern rather than group. The .223 likely has a 1-12" twist and will probably shoot them better than the .222. FWIW
Steve
