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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone running a 257 Bob Ackley?
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<blockquote data-quote="sable tireur" data-source="post: 2628132" data-attributes="member: 27307"><p>This is becoming a prevalent question these days, not just about the .25 caliber selections but others as well. </p><p></p><p>Optimum is a difficult concept to assess when it involves the bullet, powder selection and the barrel performance. There can be, as in this situation, 3 different bullets and numerous barrel lengths. I've found as many as 4 powders which perform quite well in several cartridges shooting the .25 caliber heavy for caliber bullets. I shoot all three currently but since Sierra is throttling the Blackjack, I will eventually run out of these. </p><p></p><p>I balance the powder selection against the barrel length. Slightly faster powders for shorter barrels and slightly slower powders with longer barrels. When I stick with an 'average' length barrel such as a 24" sporter, I can actually use the .25-06 AI, .257 Roberts Improved, and the .25-284 with the same powder and achieve the same velocity using that same powder in all three. In essence, the .25-06 AI has a little too much capacity for that 24" barrel while the .257 Roberts Improved is just about the volume necessary to deliver the velocity and energy necessary for the hunt.</p><p></p><p>I wouldn't be too overly concerned with the barrel length as long as you don't get too short unless using a suppressor. The average barrels these days for hunting usually run 22" and 24" where most factory manufacturing opts for the shorter length in order to save a few pennies. Personally, in a hunting rifle, I would use the #3 Bartlein.</p><p></p><p>I have a competition barrel chambered for the .25 WSSM which is 30" in length. It works great for a little less recoil and still achieve the velocity for 600 - 1,000 yards targets.</p><p></p><p>Enjoy your project!</p><p></p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="sable tireur, post: 2628132, member: 27307"] This is becoming a prevalent question these days, not just about the .25 caliber selections but others as well. Optimum is a difficult concept to assess when it involves the bullet, powder selection and the barrel performance. There can be, as in this situation, 3 different bullets and numerous barrel lengths. I've found as many as 4 powders which perform quite well in several cartridges shooting the .25 caliber heavy for caliber bullets. I shoot all three currently but since Sierra is throttling the Blackjack, I will eventually run out of these. I balance the powder selection against the barrel length. Slightly faster powders for shorter barrels and slightly slower powders with longer barrels. When I stick with an 'average' length barrel such as a 24" sporter, I can actually use the .25-06 AI, .257 Roberts Improved, and the .25-284 with the same powder and achieve the same velocity using that same powder in all three. In essence, the .25-06 AI has a little too much capacity for that 24" barrel while the .257 Roberts Improved is just about the volume necessary to deliver the velocity and energy necessary for the hunt. I wouldn't be too overly concerned with the barrel length as long as you don't get too short unless using a suppressor. The average barrels these days for hunting usually run 22" and 24" where most factory manufacturing opts for the shorter length in order to save a few pennies. Personally, in a hunting rifle, I would use the #3 Bartlein. I have a competition barrel chambered for the .25 WSSM which is 30" in length. It works great for a little less recoil and still achieve the velocity for 600 - 1,000 yards targets. Enjoy your project! :) [/QUOTE]
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Anyone running a 257 Bob Ackley?
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