I also like the FPB, and like the 350 as it shoots accurately in my guns and really flies almost as flat at the 300. I have killed 4 elk with this bullet, so it is tough enough to take it. 300 should be more than adequate for deer. Also, the "lead" is a lead alloy, so it is tougher than pure lead.
Here are a few facts about the bullet: The bullet itself is 0.499 but the rear bell/skirt is .507. Therefore it has to be custom sized to each rifle bore. I do this with a short starter/loading tip like this:
http://www.cabelas.com/product/shooting ... _104436180
In a T/C gun with a QLA (false muzzle) you just drop it in, set the starter/loading tip on top and give it a whap with your palm. that shoves it down in the barrel and sizes it to that particular bore. Then seat it the rest of the way with your ramrod
With my knight, I simply place it on top of the bore and wiggle it while pushing down with my fingers. You should be able to get it slightly started enough. To me this works better than running them through the barrel first. Then use the short starter with a "whap" to start it down the barrel.
They also shoot well in my T/C renegade. I start it the same way as in the knight (wiggle to get it started, etc)
When you pull the trigger, the explosion, "obturates" the bullet expanding it to bore size.
One more thing: the copper is just a outer skin, it does nothing to strengthen the bullet. Probably the copper fouling is less of a problem than lead.