Ramshot Silhouette
This powder sets the standard for 9MM.  It could be the best powder you can buy, period.  But that is hard to say because there are a handful of powders similar in performance and other factors.  This powder does some of the highest velocities of anything on the market.  It works well from 65 grain all the way to 147 grain bullets.
9.9 Grains comes close to filling case, but the Lehigh 65 Grain XD goes in at 1.1 OAL no issue. ~1825 FPS 4" barrel CZ P10c

True Blue left, Silhouette middle, HS-6 right.  Silhouette is cleaner than HS-6 by a lot, but not as clean as True Blue overall. 

IIIa vest exit hole (Lehigh 65 using 9.9 Sil)

IIIa vest exit hole (Lehigh 65 using 9.9 Sil)

A fine flattened spherical powder, but it looks like dirt or dust.   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.
One of the best metering powders out, highest potential velocity of "almost" anything out, good price, highly versatile from 65 grain to 147 grain bullets, low flash signature when shooting..  This is simply a super powder.  Its top tier and you might not be able to do better.
With this medium to slow burning powder, combined with its fine density, its hard to double charge cases because it would make the case near full in most applications.  One should notice that. 
We think Ramshot has some of the best reloading data of any manufacturer in existance perhaps.  They have so many loads for standard and +P listed.  Ramshot is probably our favorite powder company, they are just doing most things well.  They could hire somebody to redo their marketing/art work on their bottles thoough.  "trigger your insticts" is on the bottle with a picture of target behind a gun?  Not exactly eye catching or making a statement.  With a powder this good, this awesome, you need to make a statement. 
Folks, this powder is the powder ALL other 9MM powders are compared to and judged.  Also, we don't know if this is a coincidence, but look at how many "newer" powders have come out similar to this?  CFE Pistol, Winchester 572 for example (similar in performance and load data is "near" it.  This powder along with W572 and CFE/WAC are in the sweet spot for 9MM.  They are just the right burn rate and just the right density to work across ALL 9MM applciations.  They also produce some of the highest velocities.  Showdown upcoming.  I don't think CFE Pistol will compete with the accuracy of this, but W572 is closer.  WAC is included as well as some others in this burn rate area...
Lets take a look at some of the brass...

6.6 Grains
124 Grain Precision Delta HP
1.1 OAL
Starline Nickel 13.5 grains case capacity
CCI 500 Primers
7.1 Grains
115 Grain Speer Gold Dot HP
1.120 OAL
CCI 500 Primers
9.6 Grains
65 Grain Lehigh Defense XD
1.1 OAL
Starline Nickel 13.5 grains case capacity
These primers are nowhere near flattened and this load is well past 1700+ FPS
5.5 Grains
115 Grain Barnes TAC-XP
1.140 OAL
Above rec. manufacturer load data.  But the primer looks great in our test.
~1125 FPS
CCI 500 Primers
4.9 Grains
147 Grain Precision Delta RN
1.145 OAL
Primer looks totally fine to us, remember these are softest primers we know of.  Federal Gold Medal
6.3 Grains
115 Hornady HAP
1.100 OAL

6.0 Grains
124 Precision Delta HP
1.095 OAL

8.5 Grains
75 Grain Lehigh Defense Controlled Fracturing (CF)
1.100 OAL
Ramshot Silhouette
Slightly above average accuracy across all loads.  Of note, we tried the exact Lehigh Defense +P load of 9.9 grains using 65 grain XD bullet at 1.1 OAL and got almost exactly the results Lehigh did in their load data.  We respect Lehigh Defense a lot.  Good company, good product.  We included 2 different tests of Federal HST +P here to show everyone that reloads, even the lesser than average accurate ones, are still near commercial bought premium ammo.  Skip over to the 9MM Major page, off the powder section to see Silhouette put 4 bullets through the SAME HOLE at 10 yards, using an XD(M) OSP with Venom Red dot.  Ini terms of accuracy, Silhouette won the "Major" roundup tests.   
Ramshot Silhouette
Some of the loads we shot..
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