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
The first sign of excessive pressure is...
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="MontanaRifleman" data-source="post: 814509" data-attributes="member: 11717"><p>It's true there is no free lunch but there are a lot of variables that will produce different pressure/velocity ratios such as chamber/throat spec, bore spec, length of barrel, type and twist of rifling, primers, primer lot, powder lot, bullet make and manufacturer to name a few. Not to mention, chrony's will give different reading from same lots of ammo under different light conditions, not to mention your $100 off the shelf chrony is not the most reliable and accurate piece of precision equipment available. A 1% margin of error is equivalent to 30 fps with an MV of 3000 fps.</p><p></p><p>In the final analysis, During load development, I look for the usual sings of flattened primers, craters around firing pin holes and sticky bolts. These are not perfect indicators and also vary from rifle to rifle but they usually give you an idea of about when you are approaching excessive pressure. </p><p></p><p>My final indicator is primer pocket life. I like to see 5-6 firings before the pockets are gone. 2-3 and I'm backing down. This would be in warm weather.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 814509, member: 11717"] It's true there is no free lunch but there are a lot of variables that will produce different pressure/velocity ratios such as chamber/throat spec, bore spec, length of barrel, type and twist of rifling, primers, primer lot, powder lot, bullet make and manufacturer to name a few. Not to mention, chrony's will give different reading from same lots of ammo under different light conditions, not to mention your $100 off the shelf chrony is not the most reliable and accurate piece of precision equipment available. A 1% margin of error is equivalent to 30 fps with an MV of 3000 fps. In the final analysis, During load development, I look for the usual sings of flattened primers, craters around firing pin holes and sticky bolts. These are not perfect indicators and also vary from rifle to rifle but they usually give you an idea of about when you are approaching excessive pressure. My final indicator is primer pocket life. I like to see 5-6 firings before the pockets are gone. 2-3 and I'm backing down. This would be in warm weather. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
The first sign of excessive pressure is...
Top