Excellent choice.  



Somewhere between 175-200m.



Optimal means that the bullet will fragment.  If it doesn't do that, then you get a .22" permanent wound cavity except for an area along the wound path where the bullet will yaw and flip around.  The wound will expand to the length of the bullet for a short distance.  Now, obviously if the bullet strikes bone, there will be secondary fragments, and if the wound is near certain non-compressable organs, the temporary wound cavity can damage them, but both of these factors are true of any .223 bullet, and also can't be relied upon to be present in every case.

There is no expansion of OTM bullets.  While the tips are open, the bullet is not constructed like a hollowpoint bullet that is designed to open up at the nose and expand.  OTM bullets either fragment, or they don't.



The Sierra 69gr bullet is also good, but will have a longer "neck" for the wound path (meaning: the bullet will penetrate further before fragmentation occurs).  For this reason, the 68gr bullet is preferred, though some guns are more accurate with one bullet over the other.

-Troy

These are VARMINT bullets, designed to expand quickly.  These (60gr V-Max) bullets are designed for use on varmints no more than about 75 pounds.  Anything larger and you'll get insufficient penetration.

[url]www.ammo-oracle.com[/url]



Yes.  They're designed by people who don't understand what is important when selecting ammo for combat with the most dangerous creatures on this planet (man).

But, don't believe me.  Listen to what Dr. Fackler has to say:

[url]www.ar15.com/forums/topic.html?b=3&f=16&t=175614[/url]

-Troy