Buffalo Bore 180gr Hornady XTP (by Benchrst Jan 2016)

[The_Shadow]

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













Small ring of copper was shaved at loading...


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

[Intercooler]

Is this newer or older? Is it a real XTP?

[Pablo]

AA #9 is a relatively slow powder? (I think).

How full was the case?

I want to try this in my 10mm AR.

[Intercooler]

That has to be a full case.

[The_Shadow]

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.

[41 Redhawk]

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.

[sqlbullet]

#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.

[my_old_glock]

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.

[The_Shadow]

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