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The Basics, Starting Out
Question: Reamer Dimensions vs Chamber Dimensions vs Case Dimensions
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<blockquote data-quote="VinceMule" data-source="post: 3059038" data-attributes="member: 122164"><p>Mike, The use of the mandrels in various sizes is in reference to using with the Lee Collet dies, and checking the inside dia of the case mouth, once it is sized. Sorry for the confusion. Never underestimate just how straight the lee collet sizer sizes the neck.</p><p></p><p>Your turning system is the same as I use.</p><p></p><p>After sizing the case with a bushing die, check the run out on the neck. Running the sized case through a mandrel die, straightens out any mis alignment, and when used along with the Forster die that has been honed at the factory, you have some incredible precision ammo. There is a lot of ways to skin a cat, just use your Concentricity gauge to check loaded ammo. Some expensive dies are not worth a darn. Also, the use of a Body sizer, then sizing the neck with the Lee collet die is amazing in how straight the ammo is. These are two systems that have proven to work. </p><p></p><p>Mike, when I have made bullet seaters using the chamber reamers, I usually ended up lapping out .0015-.002 to give clearance to help in the brass "spring back". Your gunsmith may have already done this. Otherwise, the seater die is often used as sizer die, which hurts nothing but gets tiresome. This issue usually occurs when the brass is work hardened from 5+ firings where the brass was sized down, then springs back to some degree. </p><p></p><p>I never get mad over discussions on methods, this is how we learn. All I have learned has been from older and very experienced gunsmiths and shooters. We pass on the knowledge from shooter to shooter, and hopefully, we never quit learning.</p></blockquote><p></p>
[QUOTE="VinceMule, post: 3059038, member: 122164"] Mike, The use of the mandrels in various sizes is in reference to using with the Lee Collet dies, and checking the inside dia of the case mouth, once it is sized. Sorry for the confusion. Never underestimate just how straight the lee collet sizer sizes the neck. Your turning system is the same as I use. After sizing the case with a bushing die, check the run out on the neck. Running the sized case through a mandrel die, straightens out any mis alignment, and when used along with the Forster die that has been honed at the factory, you have some incredible precision ammo. There is a lot of ways to skin a cat, just use your Concentricity gauge to check loaded ammo. Some expensive dies are not worth a darn. Also, the use of a Body sizer, then sizing the neck with the Lee collet die is amazing in how straight the ammo is. These are two systems that have proven to work. Mike, when I have made bullet seaters using the chamber reamers, I usually ended up lapping out .0015-.002 to give clearance to help in the brass "spring back". Your gunsmith may have already done this. Otherwise, the seater die is often used as sizer die, which hurts nothing but gets tiresome. This issue usually occurs when the brass is work hardened from 5+ firings where the brass was sized down, then springs back to some degree. I never get mad over discussions on methods, this is how we learn. All I have learned has been from older and very experienced gunsmiths and shooters. We pass on the knowledge from shooter to shooter, and hopefully, we never quit learning. [/QUOTE]
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Question: Reamer Dimensions vs Chamber Dimensions vs Case Dimensions
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