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Byron and other 60 grain Vmax fans: Do they ricochet?
Nope, they are designed to fragment on impact.
The frangibles (plastic tip bullets) have a very definite "performance envelope", defined by their retained energy at POI/SD versus the thickness/density of the target. They are designed to fragment violently when they impact within their performance envelope. That performance envelope will always be narrower for light-for-caliber (low SD) bullets.
If they have too much energy at impact, they can fragment too soon causing "splashes" (even without hitting bone). That can happen with light-for-caliber bullets out of a fast twist barrel at high velocities, in other words, short ranges. A 40gr Nosler BT at 4500fps out of a 1:8 250 is great fun on a p-dog, but will cause a horrible splash wound on a coyote at 50YDs.
If they don't have enough retained energy at impact (long ranges), they won't fragment "explosively" (not an actual explosion) as designed, and may fragment into 2 or 3 pieces that will have an unpredictable wound channel track, or not fragment at all. I've figured out (I think) that a 50gr V-max is on the edge of it's performance envelope at about 200YDs out of a .223. A 200YD frontal shot on a coyote may or may not drop him right there, it's going to depend on the unpredictable wound channels produced by the 2 or 3 oddly shaped fragments produced.
The 60gr V-max should stay effective out to effective .223 ranges, though I haven't played with them yet (got my 243WSSM), and should also be heavy enough that short ranges should still be effective too.
The frangible bullets work far better than anything else as long as they are within their performance envelope.
If you have doubts about the effectiveness of a particular frangible bullet due to widely varying ranges, body sizes, etc., a traditional HP or SP bullet has an extremely broad performance envelope, and though not nearly as effective as a frangible at it's best, it will work pretty well at just about any ranges/velocities it's possible to shoot it at.