The "L" frame came about to correct certian deficiencies of the "K" frame. The "K" .357 sometimes had problems when firing the 125 gr and lighter projectiles. Probelems included bad forcing cone errosion and spliting. This seemed to stem from a thin forcing cone wall at the 6:00 position. This thinner point was to accomadate the ejector rod. The "L" frame change that design. The "N" predates the "L" frame. Which is best? Neither! It all depends on the use or purpose of the gun. The "N" is a heaver frame bigger grips, a real boat anchor. "L's" and "K's" are simular in grip size but generally have full lugs and beefier in the barrel to frame area. The "K" frame or medium size will do about anything and seem to balance or handle better or least for some. They graced untold numbers of police officers holsters. "J" frames are small 5 shot concealable guns.

Otis, what are you trying to do? I think we need to establish your motive and intended use to even begin to answer the last part of your question.