TAB,
What he is doing is scary, but hasn't crossed the danger level. He's loading a light target load (2.72 dram eq) and 1 oz shot. Compare that to a heavy hunting load of 4.23 dram eq. and 1 1/4 oz shot. Pressures are equivilant (we scrambled to check that when it happened).
I'm not saying it is acceptable, or we should plan on getting by with it, but he is still within a limit that his gun won't blow up over it.
Part of reloading is having the resources available to know not only what you want to load, but also what other loads there are and how they act. Then you take your equipment and double check your reloading. I keep my scale next to me at all times and check powder charge about every 50 rounds (for shotgun loads I check shot at the same time).
Most loads I do are standard loads right out of the book. But, some loads for different guns are hot or weak. On both of these I don't let the powder charge varie by more than 0.1 grains due to high pressures or possibility of squibs.
By the way Ulmus - don't mess with special loads without guidence of those that know what they are doing. It is not for the average guy to experiment with. However, normal reloading when done properly (just like shooting properly) is no more dangerous than storing ammo.