I just might have to try some of them in my 223, I had the opposite results with the varmint grenades, not in 204, but the 36 grain .224 varmint grenade. I dont have a chrono, but I loaded them in my 223 with 24.5 grains of h322 which would probally push them 3400 plus. Anything past 100 yards or so the bullets wouldnt open up, I first shot them on paper where the did shoot pretty well, I took some groundhog hunting and was having exits and a few ricocets, somthing a bullet advertised as a grenade shouldnt do, curiosity got the best of me so i shot some water bottles, at 100 yards they had little expansion and at 150 there was just a single hole in and single hole out, alot of times the bottle wouldnt even fall over, I have searched alot of forums and i seem to be the only one who has had these results, I may try another box to see if i got a "bad" box the first time.
heres a pic of a groundhog I shot with a varmint grenade at around 100-125 yards, as you can see the bullet did exit with a slightly bigger than caliber sized hole.
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