Most of the powders I use are of the coarse extruded types and none of the conventional measures give me any confidence to plus or minus .1 grain.
Before the current crop of electronic powder dispensers were born the old AMT company designed an auto trickle system that dumped the powder into an Ohaus beam scale. 

Because I shoot a lot of SR4759 I bought the remnants of an AMT Autoscale and sent it to Lyman for replacement of the missing pan.  
The Autoscale works great for dispensing coarse powders especially SR4759. 
For large charges (50 grains and up) some people complain about the Autoscale being a little slow. Eventually I bumped into 2 more that I got for bargain prices.  My brother swapped me out of one.  When I need to run a large lot of ammo with large powder charges I set up both scales for the same load. Then I dump one charge while the other trickler is running.
Because these use a light detecting photo diode to switch off the tricklers getting SR4759 to the tenth of a grain is easy. The beam is made by Ohaus and is the same beam used in the 5-10 and 10-10 RCBS scales. 
AMT went out of business and Lyman took over the Autoscale for a decade or so.
AMT scales are all chocolate brown. 
A few Lyman scales are chocolate brown but most are Lyman orange. 
I have all 3 combinations. The only variations I have found is the power jack for the power supply. When I got my old AMT repaired Lyman sent me a one size fits all universal powder supply. 
They work great for SR4759.

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I know that this is going to sound heretic what with all the folks that love 4759 and bemoan it's passing, I use this powder in cast bullet loads in my Finn model 27 Moisin Nagant rifle. Lyman's 314299 and 20.0 grains in Hansen cases and set the sights for 600 yds for shooting @100 yds. Frank

SR 4759 has been great for me over the years. Have been using Reloader 7 also for the past ten years. 5744 for the past 5 years. All seems great in my 45/70s.  Jay

Since accuracy is the only results anyone actually wants to obtain and accuracy is the results of minimum variation in all aspects I am surprised at some of the responses I have read above.
-If the powder in question is not as accurate as possibly other why would you use it? There is always a replacement if you do the experimentation, work!
-If the powder doesn't measure very well (and I agree with this conclusion) why dispense it with a powder thrower? I would throw a short load and then trickle on a weight scale each and every charge. (I know this is not quick but what do you want easy or accuracy?)
-If the powder has inconsistencies between lots then don't shoot a target across lots. Use a single lot for any given match. Mixing seems like a lot of work and now really all you have done is spread the inconsistencies.

I know this won't be of much practical help unless you are already a collector of old powder measures or want to begin a quest, but I found I could get my most consistent drops of 4759 from an old Ideal #5 Micrometer powder measure.  They haven't been made for about 65-70 years, but they do show up on flea-Bay fairly often.  I was using 13.6 gr of 4759 in my 32-40 high walls as far back as I can remember.  I think I have about 8-10 pounds or so of it around in various containers, the largest of which is one of the 1 gallon sized "bleach jug" containers the surplus dealers used to sell it in (8 pounds??)  I've slowed down using it now, just for my 32-40 offhand rifle, so it should outlast me.

Froggie

Mr. Frog, you go ahead and live long enough to use it all up, and some of the next batch when they start to manufacture it again, again. 
I'm still liking my version of the green frog 4759 load

Mr. Frog, Since you have stated your favorite powder charge of SR-4759 you use in the 32-40 cartridge please tell us what the bullet is you favor. What is it's weight?

                         Thank you, Sendaro

I'll join in here by saying that I got the notion to try it when I read  his load for 13.6 gr 4759 and a bullet of 196 gr. Well, I have a mold that casts that (different than his) and same powder. So what the hell, it'll be fun I say. Turns out that it is accurate as heck and pretty much became one of my favorite loads. 
I chalk most of it up to the powder charge being just right for the caliber. Previously, my charges, like yours, were lighter, with decent accuracy. This didn't get anywhere near high pressure, and I'll never know why my loads had remained as light as they had. The only downside is that it'll hasten the end of my stash by just a wee tad.