These are mostly semi-auto experiences. Most of the non-functioning loads would probably work just fine in a bolt action rifle though, given that their only fault is being too light to cycle a semi-auto.
Cycled PS90 perfectly in slow + rapid fire. Slight pressure signs. Do not try in pistol without extensive research!
5.7x28mm
40gr V-Max
Alliant Blue Dot
6.0gr
WSP
YES, FOR PS90
Cycled PS90 perfectly in slow + rapid fire. No pressure signs. But, do not try in pistol without extensive research!
Above load "feels" and sounds like factory ammo. Have fired over 250rds, no damage to PS90.
7.5x55 Swiss
150gr .308 PSP
2.790"
Hodgdon H335
40.0gr
WLR
YES
No pressure signs, worked fine in a K-31. Felt a tad lighter than surplus.
7.62x51 NATO
150gr .308 PSP
2.800"
Hodgdon H335
41.0gr
WLR
YES
Cycled PTR-91 (HK 91 clone) just fine, no pressure signs.
7.62x39mm
123gr .311 FMJ
Hodgdon H335
30.5gr
WLR/WSR
YES
Cycled AK just fine, no feed issues whatsoever.
Above load behaves normally in an AK, without pressure signs. Compared with Fiocchi factory ammo, much larger muzzle flash and more reliable cycling in an (experimental, new) AK pistol which wasn't cycling Fiocci factory loads at all. Reliability increased from never cycling, to cycling about half of the time.
7.62x39mm
110gr .311 RN
Hodgdon H322
29.0gr
WLR/WSR
YES
Cycled SKS and AK just fine; feed issues on AK.
7.62x39mm
110gr .311 RN
IMR 4198
24.0gr
WLR/WSR
NO
Didn't cycle SKS in semi.
Berry round-nose bullets have issues in feeding from an AK magazine on Romanian AKM's, both hand built and factory. However, they seem to feed just fine with the SKS. At issue is that they're much shorter than the conventional pointy-tipped rounds, which results in major feed ramp issues. Of course, because they're .311 caliber, they're useless for anything in my collection except the SKS.
50 Beowulf
335gr FMJ/JHP
Hodgdon Lil' Gun
36.2gr
WLP
YES
Cycled just fine, no pressure issues
Beowulf is said to require magnum primers. WLP primers are listed as 'for standard or magnum', and seem to work fine.
6.8mm Remington SPC
115gr FMJ
Hodgdon H335
28.5gr
WLR/WSR
YES
Cycled just fine.
6.8mm Remington SPC
115gr FMJ
Hodgdon H335
27.4
WLR/WSR
NO
Failure to cycle. Will try 28.0 and 28.5.
6.8mm Remington SPC
115gr FMJ
Hodgdon H322
26.4
WLR/WSR
YES
Cycled just fine between 26.0 and 26.6; 27.0 had one failure.
6.8mm Remington SPC
115gr FMJ
IMR 4198
23.5gr
WLR/WSR
NO
Even at 23.5gr (stated max load), never once cycled a Stag 16" upper.
223 Remington
55gr BTFMJ
IMR 4198
19.0gr
CCI SR
YES
See Notes Below - not for all rifles!
Notes on my IMR 4198 load
This is the very cheapest load I've seen, heard of, or used for 223. It's light, uses little powder, and doesn't have a lot of recoil. However, various friends of mine have reported that it doesn't work reliably for their rifles. I'm going to chronicle here where this load works and doesn't work, so that folks don't potentially waste time with this load in a rifle that isn't likely to work with it.
My friend Doug says on his tests, it seems that there's a consistent pattern of 20" rifles failing to operate. The bolt carrier moves far enough back to eject a round, but not far enough back to catch the next round and chamber it.
If you're trying to make sense of the abbreviations, see RefProjectileAbbreviations. The reason the vendor isn't listed in the table above, is because I may end up buying bullets from multiple vendors. If I end up loading different weights, I'll note the vendor here too.