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
How critical is measuring powder to .01 grains
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="ImBillT" data-source="post: 2788220" data-attributes="member: 117715"><p>2800/40=70 is sound math, but the relationship is not linear. Looking at load data for H4350 Hodgdon is showing 49fps per grain. Some other powders showed similar results. 4.9 fps per .1gr is not a long way in absolute numbers from 7fps per .1gr, so perhaps there's some basis for a benefit to being more precise than +- .1gr with your powder charges. According to the load data +- .1gr should actually keep you under 10fps SD(which I'm doing). +-.02gr should keep under 2fps SD. Are you achieving that? Most of my shot strings are single-digit or very near in the one gun that I've really tried to get a load that would do that in. Because it's a 51.2gr load, it's likely a little less sensitive than a 6.5CM sized cartridge using around 40gr.</p><p></p><p>I've never had a scale that read to such precision, but with scales that read to .1gr, they are rarely particularly accurate down to the .1gr. I suppose any scale could be made to read to .02gr even if it were no more accurate than a scale that wasn't even accurate down to .1gr. But I also suppose that if some scale that reads down to .02gr happens to be more accurate than some other scale that reads to .1gr, then the more accurate scale would be of some advantage however small.</p><p></p><p>I don't consider my +-.1gr loads to be sloppy by any stretch if the imagination, but I don't shoot a mile. I guess getting your SD under 10fps would be of some advantage at that range. I haven't shot past 1000yrds, and haven't shot passed 500yds in quite a few years.</p></blockquote><p></p>
[QUOTE="ImBillT, post: 2788220, member: 117715"] 2800/40=70 is sound math, but the relationship is not linear. Looking at load data for H4350 Hodgdon is showing 49fps per grain. Some other powders showed similar results. 4.9 fps per .1gr is not a long way in absolute numbers from 7fps per .1gr, so perhaps there’s some basis for a benefit to being more precise than +- .1gr with your powder charges. According to the load data +- .1gr should actually keep you under 10fps SD(which I’m doing). +-.02gr should keep under 2fps SD. Are you achieving that? Most of my shot strings are single-digit or very near in the one gun that I’ve really tried to get a load that would do that in. Because it’s a 51.2gr load, it’s likely a little less sensitive than a 6.5CM sized cartridge using around 40gr. I’ve never had a scale that read to such precision, but with scales that read to .1gr, they are rarely particularly accurate down to the .1gr. I suppose any scale could be made to read to .02gr even if it were no more accurate than a scale that wasn’t even accurate down to .1gr. But I also suppose that if some scale that reads down to .02gr happens to be more accurate than some other scale that reads to .1gr, then the more accurate scale would be of some advantage however small. I don’t consider my +-.1gr loads to be sloppy by any stretch if the imagination, but I don’t shoot a mile. I guess getting your SD under 10fps would be of some advantage at that range. I haven’t shot past 1000yrds, and haven’t shot passed 500yds in quite a few years. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
How critical is measuring powder to .01 grains
Top