While seaching for P40HST1 loads locally I ran across this load.  Is it the similar to the P40HST1?  It does have the HST bullet but I can't find any info on Federal's website about ballistics or quality.   The packaging is a white box with a stick label that says brass case.

found this on another forum

I sent an E mail tp Federals LE rep about the XM40HC and this is what I was told.. There are basically 3 differences between the P40HST1 and the XM40HC:
1.. Velocity
P40HST1 990-1025 FPS
Xm40HC 1015 +/- 16 FPS
2.. Muzzel Energy
P40HST1 406 ft lbs
XM40HC 410 ft. lbs
3.. Bullet Push
P40HST1 80lb min
XM40HC 70 lb min
He stated this ammunition was made for a customer, whether it was Military or Police was not specified. The ammunition that is available is the excess that was not purchased from the original order and made availabe for sale. It is HST. Hope this helps.

Thanks for the info.  I would have to add the lack of nickle case being #4 from what I've read.  It looks first rate unlike some of xm193 I've shot.  I'll have to test the velocity.

I never choroned it, but it shot well.   Cabelas had some on sale a while back.

I believe I read on SGA Ammo or AmmoToGo that the white box stuff is a factory over run that was made for a government contract. It is the same ammo as the P40HST1, without the nickel cases. I use it exclusively in my carry gun, a M&P40c. It is quite accurate, very consistent, has a low muzzle flash, and the recoil is similar to a quality target round, like Blazer or Blazer Brass in 180 grain. It's my favorite defense round for all the aforementioned and the best part is it's a fraction of the cost of the retail price. I buy all of it I can afford and trust my and my family's life to it everyday. OP, I would have zero reservations about buying and using it.

I managed to get out and chrono a few rounds but didn't fire for group as it was too cloudy.

Temp: 40      Distance: 10 ft from muzzle

Velocity results for five shots.   Weapon: Glock 22

Hi - 1066 fps

Lo - 1037 fps

Avg - 1055 fps

Sd - 12.28

ES - 28.97

Shots fired : #1 1047, #2 1037, #3 1062, #4 1062, #5 1066

The load appears to be on the high side for velocity vs bullet weight.  I reviewed a chart of factory loads in 180 gr weight with velocity ranges between 950 -1025 fps.  "P40HST 1" velocity spec range 990 - 1025 fps.  "XM40HC" load averaged 30 fps faster than factory spec ammo.  According to specs in above post it XM40 exceedes its own specs by 24 fps on average.      

So its a .40+p then. Thanks for chrono-ing the ammo. How long is a G22 barrel? 4.5 inches I'm assuming? That is some pretty impressive velocity.

It's a good round. I carry it in my G23. It's in a plain white box and brass cased due to a Government contract overrun.

If memory serves me right the Glock 22 barrel is 4.49".  +P, It's probably close when you consider the high end of 1066 fps but there are no specs for such a load that I'm aware of.  I'm not sure if it will effect bullet performance.  Hot-rodding 40's with heavy bullets is not a good thing as it operates at peak pressures with normal loadings.  When you consider Glock chambers are hogged out for feed reliability, hotter isn't always better.  Changes in OAL could cause pressure problems.  I will be monitoring the rounds that are loaded & unloaded frequently for OAL.

Thanks for answering the barrel lenght question. As to the .40 pressures, yeah, there is no specs for a .40+p load. I was alluding to the fact that the velocity of the tested ammo is 40 to 50 fps faster than the average for the 180 grain stuff.

Your were right on the barrel lenth as I originally posted 4.34" & then corrected it to 4.49.  You would think I would know my own barrel length.  A couple nights ago I ran across a article about the load developement for the .40.  Action Arms & Winchester reps provided pressure barrels for the test loads.  The author of the article had a 1911 with a bo-star made barrel installed.  They ran comparisons of bullet weights from 150gr - 190gr for velocity & pressure.  The rating system was based on the factory velocity for a given load.  Winchester 180 gr @ 950 developing 30,500 psi  which is well below the maximum of 35,700 psi as stated maximum.  The Winchester control load for testing purpose was considered 100% of pressure.  A couple of 180gr loads caught my attention due to their velocites.  Velocity of 1220 fps were recorded out of the 1911 with a test barrel velocity of 1130 & pressure 136% above control load.  Another load with velocities of 1063 fps from the 1911 & 1028 fps from the pressure barrel. This is close to the velocity of the XM40 load.  Pressure was 126% of the control load.
Company rep stated loads up to 115% of factory standards are at the upper limit of pressure curve for the .40.  XM40 is likely at the higher limits.  From a velocity stand point you could call it +P.   I'm sure Federal wouldn't allow anything excessive to slip through.      

Thanks to the warm weather & sunny sky I was able to shoot XM40 for group.  From the sand bags at 25 yrds using a Glock 22 I was able to shoot a five shot group of 2.40".  I only shot one group without much effort so its a small sample.  I 'm sure accuracy would do a little better with more testing but thats fine for me.