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
Which press?
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="Bart B" data-source="post: 513422" data-attributes="member: 5302"><p>Lots of technical mumbo jumbo but no answers to my questions. But I know some folks like explaining their perfect path to precise precision by endless exactness. I doubt reloading presses need to be made with tolerances to 4 places for three reasons:</p><p></p><p>One is there's enough sideways slop between shell holder and case head that any misalignment up to several thouandths between the ram/shellholder centers to the die centers is a non issue.</p><p></p><p>Second, No case is perfectly centered along its entire axis with the chamber when its fired. The back end's usually pressed against the chamber wall opposite the extractor with a tiny bit of clearance to the chamber wall opposite that contact point. An exception's when the case is banana shaped enough to touch the chamber wall near midpoint between the case extractor groove and shoulder-neck edge; the front end's well centered in the chamber shoulder and the back end's got a tiny bit of clearance all the way around.</p><p></p><p>Third, cases don't have to be perfectly straight on an axis between the bullet tip and the center of the case head. All cases are a tiny bit out of round and swell perfectly evenly against the slightly out of round chamber walls long before the bullet's out the muzzle each time they're fired. At peak pressure, the case is always perfectly centered in the chamber but by then the bullet's some distance down the bore.</p></blockquote><p></p>
[QUOTE="Bart B, post: 513422, member: 5302"] Lots of technical mumbo jumbo but no answers to my questions. But I know some folks like explaining their perfect path to precise precision by endless exactness. I doubt reloading presses need to be made with tolerances to 4 places for three reasons: One is there's enough sideways slop between shell holder and case head that any misalignment up to several thouandths between the ram/shellholder centers to the die centers is a non issue. Second, No case is perfectly centered along its entire axis with the chamber when its fired. The back end's usually pressed against the chamber wall opposite the extractor with a tiny bit of clearance to the chamber wall opposite that contact point. An exception's when the case is banana shaped enough to touch the chamber wall near midpoint between the case extractor groove and shoulder-neck edge; the front end's well centered in the chamber shoulder and the back end's got a tiny bit of clearance all the way around. Third, cases don't have to be perfectly straight on an axis between the bullet tip and the center of the case head. All cases are a tiny bit out of round and swell perfectly evenly against the slightly out of round chamber walls long before the bullet's out the muzzle each time they're fired. At peak pressure, the case is always perfectly centered in the chamber but by then the bullet's some distance down the bore. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Which press?
Top