tiny, bided is on the $$ good information on savage chamber and about the ammo, 5.56 vs 223.

I haved the asked the same, what I found helpful was:

1. sharpshooter responded that savage cuts their 223 bit longer than a pure 223
2. other users have reported that they have shot many hundreds of 5.56 rounds through their factory savage 223 without any issues.

If you are in doubt or want to confirm what you have, just cast your chamber and measure.