......I was going to ask what that meant....I have never heard of such a thing...nor do I see any way any such thing can happen. I do a lot of experimenting with light loads....one such experiment was with a 30 Remington, rather than a 35 with 200 gr Billy Bullets. The only mishap that I ever had with super light loads was with that rifle, with 200 gr. Billy Bullets......I was doing the Limbo...(seeing how low I could go) ...got it down to 4 grs of Red Dot and tried for 3.0...the bullet was just protruding about 1/4 " out of the end of the muzzle. Very Embarassing....didnt know what to do about it.....tried to blow it out the rest of the way with a slightly larger charge packed with Cream of Wheat.....would not work, so now I had a really stupid situation, no way it is going to a gunsmith with a bullet stuck and about 3 ounces of Cream of Wheat stupidly stuck behind it. I just set it aside and muled it over for about a week, and finally figured it out. JUST A HINT HERE.....Be very careful with ANY reduced loads, the least you can do is to get a bullet stuck, the next thing that will happen is that you will ruin a perfectly good firearm, beyond that...the next step is that you could loose your eyesight, your hearing, sections of your face and/or hands or even DIE.
If you insist on these kind of experiments,
FIRST..DO NOT SIMPLY REDUCE THE AMOUNT OF THE POWDER THAT YOU NORMALLY USE IN A LARGE CAPACITY CARTRIDGE. YOU MUST USE DIFFERENT POWDERS FOR THESE LOADS (RED DOT, BLUE DOT, XMP5744 ect) Or use published Whisper data for sub-sonic loads if you have a small cartidge similar to the Whisper, like a 7.62x39. 2nd....Do not use a firearm that you cannot use a cleaning rod from the breech to pound out a stuck bullet. A Condender or a Bolt Action or other kind of Break Barrel is fine.
3rd...Lubed Cast bullets work best, and it is also a good idea to clean and lube the bore after each shot, you will be less likely to get one stuck.
4th...and maybe most important....Be sure the bullet has exited the barrel before chambering another one. Use a target, and count your hits, or simply look in the barrel. If there is a bullet stuck in the bore and you fire another round (especially a fully loaded round) say goodbye to your face.
5th...in my opinion...a 311 bore (SKS) works best with .308 bullets. It is a lot more forgiving with very small reduced loads, (Cat's Sneeze Loads as they are called in Finland, or S.W.O.S.=silent without a Silencer)and the size of the cartridge is very much like using a Whisper and less likely to have the problems caused with using a large capacity case.
6th, and my final opinion here........DONT DO IT! Stick with the published loads that are intended for safe operation in your firearm. This is the best way to guarantee your good health and eyesight. Live long and prosper.