Cartridge is from Ammo Manufacture:  Winchester

Muzzle Velocity; Advertised:   1080 fps
Actual Instrumental Velocity:   1053 fps  4.6?€ G20-SF ; 1083 fps KKM barrel
Muzzle Energy; Advertised:   466 ft/lbs
Target circle 5½"





Brass Make/Head stamp:  WINCHESTER 10mm AUTO
Bullet Make/Weight/Construction/Info:  Winchester 180gr FMJ
Actual Weight:  179.9grs
Diameter; .3998?€   .604?€ long







Crimp diameter:   .4217?€
C.O.A.L.:   1.250?€
Primer:  Brass color  WLP?
Case:   Brass   
.983?€ long   76.4grs w/primer

Powder Description/Positive ID/Type/Charge Weight:  Flattened Ball;  6.0grs







Expansion data; 
.4332, .4339, .4332, .4336, .4338?€

This ammo is a great deal.  Not only does it shoot well, it?€™s about fourteen dollars cheaper per box than the Federal and Remington counter parts.  I paid $25.46 for the Winchester ammo at Cheaper than Dirt.  Rem and Fed ammo is 38-39 dollars a box.  Good job Winchester.

Thanks for the pull-down data RDub01! 
It looks like the powder is Tight Group...
Hodgdon shows 180 grain JHP using 6.0 grains as a max load @ 1141 fps 34,300 psi