I dont think, or I have seen no proof Stoner knew exactly what the effect would be. Could be wrong, so if someone has a URL Im interested in reading it. As a target guy I have not paid much attention to the wounding side of it, paper is paper. Anyway I spent some time digging in my info as I got interested in the Q and my books have quite a lot on it.
The first commonly issued M16 had a 1 in 12 twist (lets ignore the 1 in 14 oopsie) and first, the 55gr FMJ. From what I have read that bullet only worked because it was only just stable and because of its very high velocity, 3200fps. So as long as you are above 2500fps the proper/real FMJ is going to split in 2 major pieces at the canalure plus fragment and do a lot of damage, it also reads that it needs to be not over-stabilized.
So shooting the proper 55grain FMJ in a 1 in 12 twist (typical?) 22inch barrelled boltie at a terminal velocity of no less than 2500fps might work very well (<250m?), Note by 2300fps the bullet is no longer snapping in half by the way from the photos/research I have seen.
There are also FMJs and FMJs. So Belmont sells what they call seconds, 556nato, 55FMJs at $28 (ish) per 50 strikes me they are cheap, seem pretty accurate from my target testing so could work really well in a bolt gun on an animal below 200 or maybe 250m. The FMJs in say barnual ammo? I have no idea if it breaks up the same, it might be stronger as its steel jacketed? best avoided I suspect. If hand loading for a bolt gun, well it looks like you want them as fast as possible to work better.
If you are going to have a go, let us know how you do, I for one am very interested if it works, especially as its cheap!
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