Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
bushing neck sizing die?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="BountyHunter" data-source="post: 313107" data-attributes="member: 12"><p>Big time wrong assumption!</p><p> </p><p>You would not have to neck turn, depending on the size of your chamber neck. ie unless it is a tight neck chamber. Absolutely not needed for factory chamber!!!!!</p><p> </p><p>You are simply adjusting the amount of tension put on the bullet compared to the neck thickness. Instead of say .008 neck tension you are using different bushings to give say .003, which is probably a good number to have in a magnum magazine load.</p><p> </p><p>A standard die is going to squeeze the bullet/case neck down to a certain size regardless of the neck thickness of the case.</p><p> </p><p>A bushing die allows you to change bushings and maintain a standard neck tension squeeze.</p><p> </p><p>Yes, the imperfections are pushed to the inside, but unless you have wide variations in neck thickness on a case, you will not be able to normally tell it in group size in a factory chamber. You have to remember the difference between a factory chamber (sloppy all around and nothing you do to the case will change that with a factory die) and a tight neck min SAAMI (minimal gap between loaded round and chamber walls and neck).</p><p> </p><p>Now if you run the expanding mandrel back in you will push the imperfections to a minor degree back out. However, any mandrel sized to do that and you will not have neck tension on the bullet, so back where you started from with basically an unsized neck.</p><p> </p><p>IMO too much effort is being spent on neck turning in factory chambers and barrels when you will not routinely show a 10% decrease in group size. Bigger decreases will be shown in load development with powder, primer and seating depth adjustments.</p><p> </p><p>Concentricity has nothing to do with being a non neck bushing or neck bushing die. It simply has to do with the quality alignment of the reaming of that particular die and its alignment with your press and shellholder.</p><p> </p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 313107, member: 12"] Big time wrong assumption! You would not have to neck turn, depending on the size of your chamber neck. ie unless it is a tight neck chamber. Absolutely not needed for factory chamber!!!!! You are simply adjusting the amount of tension put on the bullet compared to the neck thickness. Instead of say .008 neck tension you are using different bushings to give say .003, which is probably a good number to have in a magnum magazine load. A standard die is going to squeeze the bullet/case neck down to a certain size regardless of the neck thickness of the case. A bushing die allows you to change bushings and maintain a standard neck tension squeeze. Yes, the imperfections are pushed to the inside, but unless you have wide variations in neck thickness on a case, you will not be able to normally tell it in group size in a factory chamber. You have to remember the difference between a factory chamber (sloppy all around and nothing you do to the case will change that with a factory die) and a tight neck min SAAMI (minimal gap between loaded round and chamber walls and neck). Now if you run the expanding mandrel back in you will push the imperfections to a minor degree back out. However, any mandrel sized to do that and you will not have neck tension on the bullet, so back where you started from with basically an unsized neck. IMO too much effort is being spent on neck turning in factory chambers and barrels when you will not routinely show a 10% decrease in group size. Bigger decreases will be shown in load development with powder, primer and seating depth adjustments. Concentricity has nothing to do with being a non neck bushing or neck bushing die. It simply has to do with the quality alignment of the reaming of that particular die and its alignment with your press and shellholder. BH [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
bushing neck sizing die?
Top