Hornady 9mm XTP ongoing experiments

[Waylander]

Isn't #7 a little slow for your 4 inch barrel? Maybe #5 or CFE-P or similar would get you more velocity?

CFE Pistol and #7 are the only powers the Hornady manual lists that will safely push the 124 XTP to 1150 fps. The case will be slam full with #7 but it will work. #5 pressure maxes out at about 1075 fps.

[Ron3]

CFE Pistol and #7 are the only powers the Hornady manual lists that will safely push the 124 XTP to 1150 fps. The case will be slam full with #7 but it will work. #5 pressure maxes out at about 1075 fps.

I see.

So you just need another inch of barrel.

[Waylander]

I see.

So you just need another inch of barrel.

Even Hodgdon lists 124 XTP with 7.4 grains of #7 out of a 4 inch barrel at 1144 fps. I’m not sure why you’re splitting hairs over this.

[DG23]

Even Hodgdon lists 124 XTP with 7.4 grains of #7 out of a 4 inch barrel at 1144 fps. I’m not sure why you’re splitting hairs over this.

Western Powders lists the 124 XTP in 9mm at 7.3 grains of AA#7 at (their max for regular 9mm loads) 1150fps / 34750psi. Sadly their 9mm+p data does not show that particular bullet with AA#7. The Speer GD in that weight they show going up to 7.9 grains in the +p data with that powder so I would guess you have a little room to play with here if your firearm is able to fire +p 9mm rounds safely.


They do not specify barrel length or firearm used for testing.

[1168]

Western Powders lists the 124 XTP in 9mm at 7.3 grains of AA#7 at (their max for regular 9mm loads) 1150fps / 34750psi. Sadly their 9mm+p data does not show that particular bullet with AA#7. The Speer GD in that weight they show going up to 7.9 grains in the +p data with that powder so I would guess you have a little room to play with here if your firearm is able to fire +p 9mm rounds safely.


They do not specify barrel length or firearm used for testing.

Western #1 lists that exact data, using a 4” barrel. It does not specify if its a universal receiver, or a real gun. It looks like they used the standard barrel length for most cartridges and don’t mention firearm for them, and has a picture of a universal receiver in one of the sections, so I suspect they used a universal receiver for all of their data.

[Waylander]

Hornady manual

S & W Model 39
4", 1 in 10" Twist Hornady/Frontier Winchester WSP

Powders that worked exceptionally well in our test weapon were Accurate #7, and Alliant Power Pistol.
Velocity differences between 4" and 5" barrels were negligible.

What’s interesting is they show a larger max charge of 7.9 grains Accurate #7 only pushing to 1150 and from what I understand, their recommended max loads are usually on the conservative side.