Question: The song "Karmic Wheel" contains audio samples from the suicide of the 30th Treasurer of Pennsylvania who shot himself with what kind of revolver?

Context paragraphs:
Francine Irving Neff: Francine Irving Neff (December 6, 1925 – February 9, 2010) was the 35th Treasurer of the United States, serving from June 21, 1974 to January 19, 1977.  She was appointed by Richard Nixon but continued serving as Treasurer through Gerald Ford's term in office after Nixon resigned in August 1974.

Dead Girl Superstar: "Dead Girl Superstar" is a promotional single taken from Rob Zombie's second album "The Sinister Urge".  Zombie considered the song to be a sequel to "Living Dead Girl" from his previous album, "Hellbilly Deluxe".  It was also featured on the "Kerrang, Vol.  3" compilation album in 2002.  The song's guitar solo is played by Kerry King of Slayer fame.  It is one of the few songs on the album to contain a solo.  The song contains audio samples from the 1974 Isaac Hayes film "Truck Turner".  The song also appears in the game "Warzone 2100".

AES53: AES53 is a standard first published in October 2006 by the Audio Engineering Society that specifies how the timing markers specified in AES47 may be used to associate an absolute time-stamp with individual audio samples.  AES47 specifies a format for the transmission of digital audio over asynchronous transfer mode (ATM) networks.  A recommendation is made to refer these timestamps to the SMPTE epoch which in turn provides a reference to UTC and GPS time.  It thus provides a way of aligning streams from disparate sources, including synchronizing audio to video, and also allows the total delay across a network to be controlled when the transit time of individual cells is unknown.  This is most effective in systems where the audio is aligned with an absolute time reference such as GPS, but can also be used with a local reference.

Freesound: Freesound is a collaborative repository of Creative Commons licensed audio samples with more than 230,000 sounds and 4 million registered users (as of February 2015).  Sounds are uploaded to the website by its users, and cover a wide range of subjects, from field recordings to synthesized sound effects. Audio content in the repository can be tagged and browsed by folksonomic means as well as standard text-based search.  Audio content in the repository is also analysed using the open-source audio analysis tool Essentia, which powers the similarity search functionality of the site.

The Archaic Abattoir: The Archaic Abattoir is the fourth album by Aborted.  The song "Dead Wreckoning" contains audio samples from the film American Psycho, and the song "Threading on Vermillion Deception" contains audio from the film "Blade".

Digital mixing console: In professional audio, a digital mixing console (DMC) is an electronic device used to combine, route, and change the dynamics, equalization and other properties of multiple audio input signals, using digital computers rather than analog circuitry.  The digital audio samples, which is the internal representation of the analog inputs, are summed to what is known as a master channel to produce a combined output.  A professional digital mixing console is a dedicated desk or control surface produced exclusively for the task, and is typically more robust in terms of user control, processing power and quality of audio effects.  However, a computer with proper controller hardware can act as the device for the digital mixing console since it can mimic its interface, input and output.

Coronary Reconstruction: Coronary Reconstruction is an EP by the Belgian death metal band Aborted, released on March 2, 2010 through Century Media Records.  The album is the first to be recorded with the band's new 2009 line-up, and was released mainly as a digital EP, with only 1,000 physical copies made.  The song "Coronary Reconstruction" contains audio samples from the film "".

Renewal (album): Renewal is the sixth album by German thrash metal band Kreator released in 1992.  It is their first "experimental" album, as in this release Kreator incorporated some industrial music influences in their songwriting.  It is also the last album to feature original bassist Rob Fioretti.  The song "Karmic Wheel" contains audio samples from the suicide of R. Budd Dwyer.

Catalina Vasquez Villalpando: Catalina "Cathi" Vásquez Villalpando (born April 1, 1940) was the 39th Treasurer of the United States from December 11, 1989, to January 20, 1993 under President George H. W. Bush.  She had held minor positions under President Ronald Reagan and had chaired the Republican National Hispanic Assembly.  In 1994, Villalpando was found guilty of obstruction of justice and tax evasion.  She is the only U.S. Treasurer ever to be sent to prison.

R. Budd Dwyer: Robert Budd Dwyer (November 21, 1939 – January 22, 1987) was the 30th State Treasurer of the Commonwealth of Pennsylvania.  He served from 1971 to 1981 as a Republican member of the Pennsylvania State Senate representing the state's 50th district.  He then served as the 30th Treasurer of Pennsylvania from January 20, 1981, until his death.  On January 22, 1987, Dwyer called a news conference in the Pennsylvania state capital of Harrisburg where he killed himself in front of the gathered reporters, by shooting himself in the head with a .357 Magnum revolver.  Dwyer's suicide was broadcast later that day to a wide television audience across Pennsylvania.

Supporting paragraphs: Renewal (album) R. Budd Dwyer
Answer: .357 Magnum