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Rifles, Reloading, Optics, Equipment
Reloading
.257 ai
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<blockquote data-quote="Trickymissfit" data-source="post: 707948" data-attributes="member: 25383"><p>gotta disagree in spades.</p><p> </p><p>* the advantage of the .257AI is that you start off with a well known cartridge that is regarded well in the shooting community. Most all the better die makers sell .257AI dies without having to goto high dollar custom stuff (Forster for one). Load data is readilly available in most all the manuals. With this you start out ahead from the get go.</p><p> </p><p>* Now the Ackley improved case is one of his better designs. Ecellent barrel life. Not overbore. Excellent case life, with excellent accuracey.</p><p> </p><p>* Just looking at one of my Hornaday manuals it shows the 28 degree improved version at about 100 fps slower than the 25-06, and 300fps compaired to the .257mag. Now the AA manual shows the Ackley version at 3000fps with a 120 grain bullet(4350 powder), and the 25-06 at 100fps faster. The .257 mag is 3260fps with the same bullet and a lot more powder. We see right away that after about 54 grains of powder the 25 caliber is about done it. (you got 100fps with three to four more grains of powder). And even then they used 3100 which is no longer out there. This tells me that a 25-06AI is a waste of time other than case life.</p><p> </p><p>* now back to sub paragraph number two for further thought. Overbore cartridges are known for short barrell lives. Also known not to be as accurate as efficient cartridges. What we see in the .257 Ackley is about all the quarter bore is good for. Plus there is no serious case forming, and in a pinch you can still shoot factory ammo thru it! To get new cases you simply shoot factory .257 Roberts ammo thru it. I call that a win-win situation.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 707948, member: 25383"] gotta disagree in spades. * the advantage of the .257AI is that you start off with a well known cartridge that is regarded well in the shooting community. Most all the better die makers sell .257AI dies without having to goto high dollar custom stuff (Forster for one). Load data is readilly available in most all the manuals. With this you start out ahead from the get go. * Now the Ackley improved case is one of his better designs. Ecellent barrel life. Not overbore. Excellent case life, with excellent accuracey. * Just looking at one of my Hornaday manuals it shows the 28 degree improved version at about 100 fps slower than the 25-06, and 300fps compaired to the .257mag. Now the AA manual shows the Ackley version at 3000fps with a 120 grain bullet(4350 powder), and the 25-06 at 100fps faster. The .257 mag is 3260fps with the same bullet and a lot more powder. We see right away that after about 54 grains of powder the 25 caliber is about done it. (you got 100fps with three to four more grains of powder). And even then they used 3100 which is no longer out there. This tells me that a 25-06AI is a waste of time other than case life. * now back to sub paragraph number two for further thought. Overbore cartridges are known for short barrell lives. Also known not to be as accurate as efficient cartridges. What we see in the .257 Ackley is about all the quarter bore is good for. Plus there is no serious case forming, and in a pinch you can still shoot factory ammo thru it! To get new cases you simply shoot factory .257 Roberts ammo thru it. I call that a win-win situation. gary [/QUOTE]
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