Please DON'T ask why, but I desire a LONG RANGE (50-100 yard) semi-auto. THis will be used without a scope. Carry will be in a shoulder holster. Which weapon would be best for this application:

H&K Mark 23 .45 ACP loaded w/Aquila Ammo (117 grain 1450). I would probably have to change the springs.....?? Yes, a silencer would be an option here.

( http://www.aguilaammo.com/iq.htm )

Desert Eagle Mark XIX Component System Package .357 Magnum, .44 Magnum, .440 Cor-Bon Magnum, or .50 A.E.

( http://www.magnumresearch.com )

Weapon must be able to group well and be effective at 100 yards and closer. It must be equiped with adjustable sights.

What suggestions do you have makes/models/ammo???

Thanks In Advance!

The Glock model #35 works good at 100 yrds. I can shoot human head sized targets at 100 yards without a rest. No need for adjustable sights , just put some meprolites on it. I was surprised that the .40 round does not drop at 100 yards. The added barrel length of the #35 adds to velocity. It is very accurate too.

There is a pistolsmith in these parts that does a mean custom .45 Super.  If I remember right, they group around an 1.5" at 50 yards.

Get the Desert Eagle with a long barrel.
.44 or above.

Long range pistol shooting is my favorite thing in the shooting sports....

I guess it's that whole "using an abject so singularly unsuited to the task" Twain thing...

Anyway there are a billion options.
For a G_R_E_A_T inexpensive oprion, a CZ-52 in 7.62X25 is an OUTSTANDING long-range pistol (At exactly the distances you are talking) because of it's velocity.

The 9MM is FAR superior to the .45 at legnthend ranges, due to it's higher velocity...

A +P+ Hirth or 124 Gr. NATO out of say a Glock 17 is totally capable of hitting a man sized target at 100, I do it all the time, and have witneses to prove it.

The 10MM is one of the best, due to it's velocity, and frontal area which carries a healthy kill potential.
A Glock 20 with an extended 6" BBL is the END-

You must remember that the #1 thing you need in long range pistol shooting is the requsite skill to do it; there is no magical gun that will allow a hack to tap out to 100 with [red]any[/red] handgun.-

I've played with G35 an aftermarket .357 Sig barrel and found it very capable of 100 yard shots. With a dot sight and alot of practice this might fit your ticket. Why would you spend all the money on an H&K with a can only to use supersonic ammo? If you are looking for a good 100 yard .45 round, I have had good luck with the Ranger .45 +P round. It would also be a tad bit quieter if your using a suppressor.

How about a SIG 210

Capable of 100 yard HEAD SHOTS!, but, $2500.00, so usually out of most folks reach...

buy a Glock 20! not only will it punch paper @100yds it is also lethal @100yds. A 16rd 10mm you can't go wrong?