I shot some last summer and they are tough. I still have 4 that I use for stumping and small game. IMHO, they're not as tough as the full metal jackets. Also, they're a lighter shaft, so you have to do a little more work to get them to a good hunting weight. (I use standard 125gr heads with 100 gr brass inserts, so I like a nice heavy shaft to beef up the overall weight)I was stump shooting around elk camp last fall and both my hunting partners (wheelie shooters)were amazed at how durable the FMJ's were. I haven't broken a FMJ yet, but broke 2 "N-fused" before I switched.