<sod>'''Parker Otto Ackley''' (May 25, 1903, [[Granville, New York]] – August 23, 1989)<ref>[http://www.deseretnews.com/article/61213/ Deseret News | SERVICES PLANNED MONDAY FOR GUNSMITH PARKER ACKLEY].</ref> was a prolific American [[gunsmith]], author, columnist, and [[wildcat cartridge]] developer.  The '''Ackley Improved''' family of wildcat cartridges are designed to be easily made by rechambering existing firearms, and fireforming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity.  Ackley improved not only standard cartridges, but also other popular wildcats, and was the first to create a .17 caliber (4.5&nbsp;mm) centerfire cartridge.<ref>{{cite journal|url=http://www.gunsandammomag.com/classics/bomb_1007/ |title=.17-Caliber Ultra Bomb! |author=Dave Moreton |date=May 1968 |journal=Guns & Ammo |format=&ndash; <sup>[http://scholar.google.co.uk/scholar?hl=en&lr=&q=intitle%3A.17-Caliber+Ultra+Bomb%21&as_publication=Guns+%26+Ammo&as_ylo=1968&as_yhi=1968&btnG=Search Scholar search]</sup> |deadurl=yes |archiveurl=https://web.archive.org/web/20071228023724/http://www.gunsandammomag.com/classics/bomb_1007/ |archivedate=December 28, 2007 }}</ref><eod>
<sod>'''Parker Otto Ackley''' (May 25, 1903, [[Granville, New York]] – August 23, 1989)<ref>[http://www.deseretnews.com/article/61213/ Deseret News | SERVICES PLANNED MONDAY FOR GUNSMITH PARKER ACKLEY].</ref> was an American [[gunsmith]], author, columnist, and [[wildcat cartridge]] developer.  The '''Ackley Improved''' family of wildcat cartridges are designed to be easily made by rechambering existing firearms, and fireforming the ammunition to decrease body taper and increase shoulder angle, resulting in a higher case capacity.  Ackley improved not only standard cartridges, but also other popular wildcats, and was the first to create a .17 caliber (4.5&nbsp;mm) centerfire cartridge.<ref>{{cite journal|url=http://www.gunsandammomag.com/classics/bomb_1007/ |title=.17-Caliber Ultra Bomb! |author=Dave Moreton |date=May 1968 |journal=Guns & Ammo |format=&ndash; <sup>[http://scholar.google.co.uk/scholar?hl=en&lr=&q=intitle%3A.17-Caliber+Ultra+Bomb%21&as_publication=Guns+%26+Ammo&as_ylo=1968&as_yhi=1968&btnG=Search Scholar search]</sup> |deadurl=yes |archiveurl=https://web.archive.org/web/20071228023724/http://www.gunsandammomag.com/classics/bomb_1007/ |archivedate=December 28, 2007 }}</ref><eod>