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Hunting
The Basics, Starting Out
Fire Formed Brass?
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<blockquote data-quote="Ackley Man" data-source="post: 270601" data-attributes="member: 16583"><p>This is what I do for my 243 and 257 tight necked Ackley Improved calibers:</p><p> </p><p>Full length size with a standard caliber die (ie 243 winchester and 257 roberts) to insure the case is in perfect alignment. If you don't want to buy the FL die for the standard caliber before you start you can simply neck size. Use a good amount of neck tension if you have a neck bushing die.</p><p> </p><p>Prep the necks with case neck turning tool - you don't need to do this unless the chamber is reamed less than SAMI spec minimum. The barrel should be marked with the neck diameter if the gun has a tight neck.</p><p> </p><p>Use maximum published heavy bullet load for the standard caliber (ie 243 winchester and 257 roberts)</p><p> </p><p>Seat bullets 30 to 60 thousandts into the lands</p><p> </p><p>Lube the cases slightly before chambering - this will prevent a failure at the shoulder junction.</p><p> </p><p>As it relates to accuracy, during the fire forming process you will probably see amazing accuracy which will be deminished when you start shooting the fire formed brass. This is an anomoly that just can't be explained. I have worked with several "improved" caliber experts on this and we have never ascertained why this happens. Theoretically, it should be the opposite.</p></blockquote><p></p>
[QUOTE="Ackley Man, post: 270601, member: 16583"] This is what I do for my 243 and 257 tight necked Ackley Improved calibers: Full length size with a standard caliber die (ie 243 winchester and 257 roberts) to insure the case is in perfect alignment. If you don't want to buy the FL die for the standard caliber before you start you can simply neck size. Use a good amount of neck tension if you have a neck bushing die. Prep the necks with case neck turning tool - you don't need to do this unless the chamber is reamed less than SAMI spec minimum. The barrel should be marked with the neck diameter if the gun has a tight neck. Use maximum published heavy bullet load for the standard caliber (ie 243 winchester and 257 roberts) Seat bullets 30 to 60 thousandts into the lands Lube the cases slightly before chambering - this will prevent a failure at the shoulder junction. As it relates to accuracy, during the fire forming process you will probably see amazing accuracy which will be deminished when you start shooting the fire formed brass. This is an anomoly that just can't be explained. I have worked with several "improved" caliber experts on this and we have never ascertained why this happens. Theoretically, it should be the opposite. [/QUOTE]
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