Underwood 180gr Speer TMJ Pull-Down

[DM1906]

RMM, thank you. Sounds perfect for me as once components become more available, I want to start reloading 9 & 10mm. I've been doing it for 44mag but using Unique & H110.

PP is fantastic for 9mm, and H110(W296) is the same for .44M, but ne'er the twain shall meet.  PP is great for 10mm "lite" (.40SW-ish), but falls well short of full power.  It's MUCH too fast.  Great for target/plinkers, if that's what you're after.

[RMM]

RMM, thank you. Sounds perfect for me as once components become more available, I want to start reloading 9 & 10mm. I've been doing it for 44mag but using Unique & H110.

PP is fantastic for 9mm, and H110(W296) is the same for .44M, but ne'er the twain shall meet.  PP is great for 10mm "lite" (.40SW-ish), but falls well short of full power.  It's MUCH too fast.  Great for target/plinkers, if that's what you're after.

This is what I thought, but it is interesting to see both Buffalo Bore and now Underwood using this powder to push 180 gr. up to 1300 fps.  Alliant doesn't even list this powder for 180 gr. 10mm (not that their load data is very complete).  Longshot has produced good velocities so far but I haven't even worked up to book max yet. 

[Intercooler]

Look at the sheets and many others are also using it!

[DAVIDF]

Handloads.com lists this:

Bullet   Powder Weight   Powder   Velocity   OAL         Primer   Source
JHP                      8.7 gr   Power Pistol   1,240 fps   1.25"    Fed 150    Alliant
Suggested starting load: 7.8 gr
Pressure: 34,900

[REDLINE]

In my mind Power Pistol is an honorable mention for 10mm, but not useful far max velocity loads at reasonable pressure.

I wouldn't consider it's usefulness in 10mm limited to 10mm Lite though, more like 10mm Medium to Medium-High.  Sort of like good for the factory Winchester Silvertip load performance level.

[DM1906]

In my mind Power Pistol is an honorable mention for 10mm, but not useful far max velocity loads at reasonable pressure.

I wouldn't consider it's usefulness in 10mm limited to 10mm Lite though, more like 10mm Medium to Medium-High.  Sort of like good for the factory Winchester Silvertip load performance level.

That IS 10mm Lite.  Meaning, around factory offerings, as opposed to original factory original.  I wouldn't use it to drive a 200 gr. bullet to 1200 FPS.  Anything less is, "Lite".  This is my interpretation, and opinion, of course.

[REDLINE]

I guess it's just semantics then.  It's gotta be a "FBI Lite" equivalent before I call them Lite.  An example in my mind is that grossly over priced Federal load shown below (180gr rated at 1030 FPS) -



That is well below Winchester SilverTip territory.

[The_Shadow]

Keep in mind that in close quarter battle there are risks of pass thru of the projectiles.  Therefore rounds were limited to lower velocities with huge HP designs to limit their depth of penetration, opening up fast and slowing quickly to dump the total energy in the intended target.  Law Enforcement having a duty to act may place many people in tight quarters to bring a situation under control.  Therefore they can't risk a penetration where another person might be struck.  However they are more likely to miss the intended target under the stress of the situation ...

We are power junkies here and less likely to have an encounter as such.  More apt to experience a more open encounter with less people in the immediate area...So we opt for a faster heavy hitter.

But our main concern needs to be about proper functioning ammo without stoppages while maintaining performance levels.

[RRMan03]

Redline:
That ammo you posted is the most overpriced ammo of them all. Low power and high price. If you shoot that get a 9mm not a 10mm you do not need it.

[REDLINE]

Redline:
That ammo you posted is the most overpriced ammo of them all. Low power and high price. If you shoot that get a 9mm not a 10mm you do not need it.

I agree completely!

[REDLINE]

Keep in mind that in close quarter battle there are risks of pass thru of the projectiles.  Therefore rounds were limited to lower velocities with huge HP designs to limit their depth of penetration, opening up fast and slowing quickly to dump the total energy in the intended target.

A lighter weight bullet will fix that issue while keeping energy levels top notch and not lowering energy levels to non +P 9mm levels.

[Rick1987]

Redline:
That ammo you posted is the most overpriced ammo of them all. Low power and high price. If you shoot that get a 9mm not a 10mm you do not need it.

Worse than American Eagle? That was the first ammo I had bought.  $39 per 50.
I had 40S&W handload hotter.

[Patriot]

Redline:
That ammo you posted is the most overpriced ammo of them all. Low power and high price. If you shoot that get a 9mm not a 10mm you do not need it.

Worse than American Eagle? That was the first ammo I had bought.  $39 per 50.
I had 40S&W handload hotter.

Much worse. Hydra-shocks are $30 for 20. Any they are just about the weakest 10mm round you can buy.

[sqlbullet]

Power pistol is indicated a good performer in very light bullets for 10mm.  I think it was near the top of the list in my Lee manual for 135 grain bullets.

However, I think better performance even in the light bullets mandates a slower powder.

[45BBH]

When I loaded for 10mm, a 180gr JHP would do 1205 fps from a Glock 20 using 8.5gr Power Pistol.  9.8gr is "only" ~13% over book max of 8.7gr.  Hmmmmmmm.  I see Buffalo Bore is using even more 10.0gr, 15% over book.  I wonder if people new how much over book these are if they would think twice?