Winchester 244
This is a fast burning powder.  Best suited for range time practice, lower velocity loads and target shooting, steel plates etc.
HP38 left
W244 mid
Accurate #2 right
All pretty similar in how clean they are.  You be the judge.
Winchester 244
A flattened ball powder.  When its Winchester its called "ball" and not spherical, because Winchester owns the term "ball".  This is why other brans call it spherical.  A lot can fit into a case.  More than you will ever need.  This makes this powder more dangerous if you make a reloading error.
This powder surprised us.  You can actually get some pretty high performance out of this for such a fast powder, or should we say, "we did", with the 90 grain bullets.  We like this powder a lot and would be happy if it was all we used for range time practice, or even shooting steel competition. It is not as clean as the name suggests compared to some of the "Cleaner" powers in its category, such as perhaps Accurate #2 or D032 from Lovex/Shooters World.
Lets take a look at some of the brass...

6.1 Grains
90 grain Sig Sauer V-Crown
1.070 OAL
Xtreme brass 12.72 case capacity
Federal Gold Medal Primer (slight cratering of primer)
Blue rimmed case in back is lower pressure load for comparison of primers.
4.6 Grains
115 Grain Hornady HAP
1.1 OAL
Xtreme brass 12.72 case capacity
Federal Gold Medal Primer
3.7 Grains
147 Grain Hornady XTP
1.1 OAL
Xtreme brass 12.72 case capacity
Federal Gold Medal Primer
Winchester 244
Accuracy is just fine.  1535 FPS from 90 grain bullet, go look at the primer above. That load is so far above any recommended load.  We don't recommend any load higher than manufacturer maximums.  What works for us, may not work for you and be dangerous. 
This powder's purpose in 9 MM though, is obvious.  Its best suited for loads between 900-1100 FPS in a variety of weights.
Winchester 244
Here are some of the loads we tried with this powder..
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