Whoah, that sounds totally wrong!
I use a 3.4cc(mL) dipper for ~40gr of Bluedot (I don't have my exact numbers handy) for shotgun slugs and certain bulky powders in rifle cases like .303 British and 8x57mm. I think that is almost double the total case volume of a .45 Colt.
I would buy the Lee dipper set. It's quite inexpensive and I tend to use mine a lot even with a scale and bench mounted reloading setup. For pistol ammo (.44 special and mag for me), cast bullet shooting with poor iron sights (milsurp rifles), and a lot of my shotshell reloading it's much faster and easier than measuring each charge and works with fine flake powders that tend to jam up my powder thrower (H110 mostly). They aren't perfectly accurate but with a good technique (get a scale and try different methods until you get a small deviation) they can get you into a fairly small range.
The instructions Lee provides to use their dippers will give you really poor accuracy. You actually need to do what it tells you not to do. I dip, tap the dipper with my finger until the powder settles, top it off, tap it again until it levels, and pour into the case. When I first tried this method I measured several dozen consecutive charges this way and found it's the only way to get close to what the chart actually tells you each dipper is supposed to drop and also greatly improves precision. You will of course need a scale to check what each dipper gives you with each lot of powder (density varies) but once you have it figured out for a certain lot of powder you can write it down. I use the chart to figure out roughly which dipper to use, weigh at least 10 consecutive dips using my double-dipping method with tapping, and write down the lot, dipper volume, and resultant weight in my reloading notebook. I can usually get to within +/- 1.5-2% this way (+/- 0.5gr on a 37gr charge). Still lets me shoot 1.5" @ 50yds with my P14's old iron sights which is good enough for me.
If that's too much work just buy an adjustable powder thrower. All the major brands make them and they are used for pistol, shotgun, and non-precision rifle ammo all the time.