Possibly they are, Uncle Google will soon tell you, but for general hunting FFS you don't need them.Out to 300m, possibly further, you don't need more than a standard reticle in a 3-4x power scope if your rifle is sighted in correctly and you've taken the time to get to know your rifle/scope combo. Admitedlly a range-finder helps too.If you can't hit say a dinner plate target at 200m either practice or give up. FYI I'm a shooter for 40+ years and have a somewhat jaundiced view of shooting skills these days and I'm only average at best probably.
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