Who said this?

[Capt. Hamp Cox]

"Never try to run a bluff with a six-gun.  Many a man has been buried with his boots on because he foolishly tried to scare someone by reaching for his hardware.  Always remember that a six-shooter is made to kill the other fellow with and for no other reason on earth...If you have to stop a man with a gun, grab the stock of your six-shooter with a death grip that won't let it wobble, and try to hit him just where the belt buckle would be.  That's the broadest target from head to heel."

Added after initial posting:  This series of quotes comes from a reputable source, but I cannot personally vouch for their authenticity.

Hamp

[Qball]

Elmer Keith?

[Capt. Hamp Cox]

Howdy, Qball. 

It sounds like something old Elmer might say, but it came from someone born a bit before Elmer.  I'll give you this - his first initial was "W".

Hamp

[Brazos Bucky Smith]

Wild Bill Hickock

BB

[Capt. Hamp Cox]

Wild Bill Hickock

BB

Just so you don't think I'm trying to mislead anyone (like BB ), the first initial of his "given" name is "W", not the first initial of his "acquired" name.

 

[Capt. Hamp Cox]

Hey, Cheyenne.

This character obviously did not think "duelist is coolist".

[Brazos Bucky Smith]

Sorry Capt. !  I figured as much, but my ol' mind is kinda slow in waking up today!

BB

[Qball]

William Bonney?

[Capt. Hamp Cox]

William Bonney?

Nice try, but not the one we're looking for.

[Caucasian Wingnut]

How about Wyatt Eurp?

[Capt. Hamp Cox]

How about Wyatt Eurp?

Not Mr. Wyatt. 

Second hint:  He might go to "bat" for you.

[Caucasian Wingnut]

Hmmmmm How about "Bat Masterson" 

[Capt. Hamp Cox]

Hot dang, I think you have it ("it" being William Barclay (Bat) Masterson). 

[J.D.Cayhill]

Masterson was given the nick name "Bat" because as a boy he could shoot a bat out of the air with a rifle. Or so I have read.