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
Does switching primers affect grouping?
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="Mikecr" data-source="post: 1082058" data-attributes="member: 1521"><p>Nothing in reloading meets this condition. Anything you're absolutely sure of -fails tests elsewhere.</p><p></p><p>There are other variables other than the primers themselves, that are usually overlooked. Your powder is the biggest. There is local seating and striking of primers. And load peak pressure, and flash hole sizing..</p><p></p><p>Size of the cartridge as a factor will fail tests. A 6PPC loaded to common pressure node with N133 will wiggle a bit in results from different primers, but relatively little(to most of us). That peak pressure of ~75Kpsi greatly covers for initial ignition quality. </p><p>But if you're running a lower pressure load that just nails it, then regardless of case size, it will be very sensitive to ignition quality/variance. A given primer might not be the root cause of an issue here. It could be firing pin spring, pin setting, trigger geometry/release. It could be pocket variance and primer seating variance.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1082058, member: 1521"] Nothing in reloading meets this condition. Anything you're absolutely sure of -fails tests elsewhere. There are other variables other than the primers themselves, that are usually overlooked. Your powder is the biggest. There is local seating and striking of primers. And load peak pressure, and flash hole sizing.. Size of the cartridge as a factor will fail tests. A 6PPC loaded to common pressure node with N133 will wiggle a bit in results from different primers, but relatively little(to most of us). That peak pressure of ~75Kpsi greatly covers for initial ignition quality. But if you're running a lower pressure load that just nails it, then regardless of case size, it will be very sensitive to ignition quality/variance. A given primer might not be the root cause of an issue here. It could be firing pin spring, pin setting, trigger geometry/release. It could be pocket variance and primer seating variance. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Does switching primers affect grouping?
Top