Cartridge is from Ammo Manufacture: Buffalo Bore 180gr Sierra JHP
Ballistics Information: 10mm Auto
Muzzle Velocity: 1350 fps
Muzzle Energy: 728 ft. lbs
Pictures: Before/After disassembly:
Brass Make/Headstamp: Remington - Brass
Bullet Make/Weight/Construction/Info; Length 0.6355"/Dia. 0.4000":  180gr. Sierra JHP
Actual weigh 180.0 grains  Crimp Diameter 0.3995" 
HP Dia 0.1710"  HP Depth 0.1855" Mouth 0.2610"
C.O.A.L.: 1.2465"
Primer: Nickel color
Case: Diameter 0.4220" Crimp Diameter 0.4215" Length 0.9880"
Powder Description/Positive ID/Type/Charge Weight: Power Pistol 10.0 grains
Tested in 10mm S&W1006 5" 1349 fps June 8, 2013
Case expanded to 0.4275", primer slightly flattened, case shows some stress.

I see you got them 

I'ld like to see what those Sierra bullets look like after penetrating water jugs.

Any testing done with these yet?  One of my local stores got 5 boxes in and allowed me to take a peek inside at the bullet used so I knew if I wanted to buy them or not.  All 5 new boxes were the Sierra and the one remaining on the shelf matched my other box that I believe is a Winchester bullet.

Should be close to advertised specs.

The older Alliant data for Power Pistol in 10mm showed a max load of 8.7 grains under a 180 gr JHP for 1240 fps.  Gotta think an extra 15% of powder is going to make a difference.  I would guess them to be around 1325 actual measured velocity.

I figured they would make the velocity fine or be close since most Buffalo Bore is.  I was wondering on testing of the bullet.

They were tested a while back for velocity. You mean gel?

Yeah..he want to know how the HP's work.

Raggedyman has a whole bunch of them but hasn't said when he will get to test any.

Yes I meant gel testing for the bullet.  I will wait eagerly for the gel results.  Thanks to all the testers on here giving great information to all the rest of us.

Buffalo Bore says their loads contain flash suppresant, Power Pistol is the flashiest powder I can think of other than BlueDot
I wonder if they are using Alliants new BE-86 powder http://www.alliantpowder.com/products/powder/be-86.aspx

it would make sense, seeing as how Power Pistol = BE-84
this new powder could be a touch slower burning, which would explain the heavier charge volume.

Oh boy, Im excited, I think BE-86 may be the new ultimate 10mm powder!!!

gofastman, thanks for the info...
Well if it is what it is labeled then would be more like Bullseye than Power Pistol?   However I did write a letter to Alliant asking for load data (of which none is listed in there newest online or loading pamphlet).

I wish they would have shown some data examples...

Hopefully, I will receive some info to study soon!

QuoteWell if it is what it is labeled then would be more like Bullseye than Power Pistol?

I dont quite understand what you mean here....
as I understand it BE and PP are very similar, PP being slower burning and more forgiving, but requiring considerably higher charges than BE

Originally Power pistol was a derivative of Bullseye power hence the name BE-84 in the beginning.
This newer BE-86 will also be a derivative of Bullseye power adjusted and blended with the flash suppressants.
I am hoping for it to be closer to or slightly Power Pistol in speed of the burn rate.
However it might be somewhere closer to Bullseye?

Tested in 10mm S&W1006 5"  June 8, 2013
10mm Buffalo Bore 180gr  Sierra JHP 1349 fps