[NWPilgrim]

Mr Roberts statements are exactly what I remember as well. 2700fps is needed for a 55 gr FMJ bullet to have max yaw and fragmentation. If you have a 16" barrel you can't get this reliably beyond 200 yds. If you are shooting game/varmints or enemy beyond 200 yds you want a bullet with a better design than 55 gr FMJ.

BTW, some postings seem to interpret the question as to yawing in mid-flight. I think the OP means yaw within the target body. fragmentation mainly occurs with the 55 gr FMJ due to the yaw. As it turns broadside the fluid pressure breaks the bullet in half and thus weakened it shatters further.

Our military are politically restricted to use some form of FMJ or OTM (not intended to expand but for accuracy) but as civilians we can choose from many bullet designed that have better terminal effect over a broader range of velocities and ranges. Do a Google search for "barrier blind" and .223 or whatever. Nosler partition 60 gr, and various bonded bullets have some of the best overall effect under a variety of conditions.