.257 Roberts to .257 Roberts Ackley Improved

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Home » Member » Jeff82 » Long guns

.257 Roberts to .257 Roberts Ackley Improved

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Jeff82 Fading away... Registered: February 2002 Location: USSRa Posts: 3,641	I fired these Hornady Custom .257 Roberts +P 117 BTSP's in my .257 Roberts Ackley Improved chambered rifle. The cases are 'fireformed' to fit the new chamber. The shoulder is 'blown out' from approx 20° to 40° and the case body taper is reduced to create more powder capacity. Then I can reload them for more accuracy, velocity, energy, etc. The .257 RAI approaches (usu. within 100fps) the .25-'06 as far as ballistic qualities but with less powder used and less barrel throat erosion. It is considered the most efficient of the 'quarterbores' (.25 caliber) cartridges.
	· Date: Tue July 22, 2008 · Views: 251 · Filesize: 24.8kb, 55.7kb · Dimensions: 640 x 480 ·
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	Keywords: .257 Roberts to Ackley Improved
	Additional Categories: Firearms, Miscellaneous

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