Cartridge is from Ammo Manufacture: Buffalo Bore 180gr Hornady XTP (supplied by Benchrst Jan 2016)
Ballistics Information: 10mm Auto
Muzzle Velocity: 1350 fps
Muzzle Energy: 728 ft. lbs
Brass Make/Headstamp: A-USA - Brass
Bullet Make/Weight/Construction/Info; Length 0.6195"/Dia. 0.4000": Hornady 180gr. XTP
Actual weigh 179.4 / 180.0 grains / Crimp Line Diameter 0.3995"
HP Dia 0.1200" / HP Depth 0.2000" (tapered) / Mouth 0.2300"
C.O.A.L.: 1.2510" / 1.2530" / 1.2535" / 1.2535" / 1.2565" / 1.2575"
Primer: Large Pistol Brass color
Case: Diameter 0.4205" Crimp Diameter 0.4210" / 0.4220" (medium) Length 0.9860"
Powder Description/Positive ID/Type/Charge Weight: Accurate Arms #9 14.6 / 14.8 grains
(https://s20.postimg.cc/vhqkwnit9/IMG_0297_zpsg6sqdods.jpg)
(https://s20.postimg.cc/idl0jyyh9/IMG_0298_zps0yu5udpy.jpg)
(https://s20.postimg.cc/idl0jzdwt/IMG_0299_zpsreccnowg.jpg)
(https://s20.postimg.cc/r8luuhuzh/IMG_0300_zpsyuedptqd.jpg)
(https://s20.postimg.cc/idl0jzlml/IMG_0301_zpsn48fraoa.jpg)
(https://s20.postimg.cc/6bpmpuk3x/IMG_0302_zpstjtcqxhm.jpg)
Small ring of copper was shaved at loading...
(https://s20.postimg.org/snnfj8qxp/IMG_0303_zps7ip1lvwh.jpg)
Test Data added today... 4/2/2016 A-USA brass primer moderately flattened
Tested from the S&W 1006 1337 FPS Case expansion 0.4280" Factory 5.0" BBL
Tested from the Glock 20SF 1318 FPS Case expansion 0.4340" Factory 4.6" BBL
(https://s20.postimg.cc/3udvilfn1/IMG_0338_zpskivauams.jpg)
Is this newer or older? Is it a real XTP?
AA #9 is a relatively slow powder? (I think).
How full was the case?
I want to try this in my 10mm AR.
That has to be a full case.
These match some done awhile back, February 2015 listed as JHP's. They look and measure like Hornady XTP 180's.
It is a compressed load, I think that accounts for the variations in COAL. I my own testing I have seen where the compressed powder actually pushed the bullet back out. :-[
AA#9 is a slow pistol powder very close to 2400. I have had excellent results with it in my 41 Mag and 10 mm.
#9 gives good velocity and accuracy, and has a safety margin in that it is probably not possible to get enough in the case to cause a serious problem.
But it is not economical, as it takes almost twice as powder as Blue Dot, Longshot or 800X. And it is usually about 50% more per pound to buy. The two together means #9 costs me twice as much per load in powder.
I still burn a good bit of it though.
Quote from: The_Shadow on January 28 2016 08:06:31 AM MST
These match some done awhile back, February 2015 listed as JHP's. They look and measure like Hornady XTP 180's.
It is a compressed load, I think that accounts for the variations in COAL. I my own testing I have seen where the compressed powder actually pushed the bullet back out. :-[
At least you don't have to worry about bullet set back.
Test Data added today... 4/2/2016 A-USA brass primer moderately flattened
Tested from the S&W 1006 1337 FPS Case expansion 0.4280" Factory 5.0" BBL
Tested from the Glock 20SF 1318 FPS Case expansion 0.4340" Factory 4.6" BBL
(https://s20.postimg.cc/3udvilfn1/IMG_0338_zpskivauams.jpg)