...speaking the Safari's were a different beast for all the reasons you identify above, the TAC cartridge was infinitely more consistant and were effectively a knock open valve so either on or off so to speak. The smaller volume was a major boon.
One of my favorite bits of the Safari was the bolt handle and body were linked by a left hand thread so that as you locked the bolt down it took up any variance in COL arising from the tolerances of the components. As to accuracy I can remember clover leafing with them but there were always compromises such as the pellet having to jump from the nose cone to the barrel.