Gene, Rattlers can get big!
FWIW: Years ago, while living in Texas, there was this place outside of El Paso know as "Hueco Tanks" (Pronounced as Waco Tanks by us gringos) and it was a rattle snake haven.
Students from U.T.E.P (University of Texas, El Paso) captured a 8.5 foot, 45 pounder for their lab.... and they did it by hand!
No stick, no rope, no loop on a stick, no nothing but their bare hands!
One would think University students would have better sense, but apparently that is not always true.
At Cumberland Gap Virginia, at the entrance to the park, there is a Cane Break Rattler in a large glass cage of formaldehyde(?sp) that was killed by the CCC (Civilian Conservation Corps) back during the Great Depression, and it weighs over 80# and is about 12' long, if I remember correctly...I do remember the 80 pound part, but I am no longer sure about the length...anyway, it is big!
Back when I was much younger, and a whole lot dumber, we would go out to Hueco Tanks to get rattlesnake meat for some of our party's.
(Supposedly this adds class to party's in the Southwest) The weapon of choice was the lowly .22 with bird-shot.
To get back on the subject, I would say that a C&B, properly loaded, would do the job. but I personally no longer have any desire to get within pistol range of any snake.....when it comes to snakes, I'm a lot like 3-Hawks. Besides that, they seem to always make me hurt myself!
Uncle Russ...