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
12 Twist 22-250/69g SMK h/t Michael Courtney
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="benchracer" data-source="post: 960103" data-attributes="member: 22069"><p>My initial tests were done at approximately 1000 ft ASL in 70 degree weather with Hodgdon starting loads for Superformance to see if the bullets would stabilize from my rifle. The load workup that I posted was done at 1860 ft ASL in 75 degree weather. I don't have barometric pressure data for either day. According to your calculator, the 69g SMK would be very near borderline (Sg=1.2) at those temps and standard pressure (I don't know how to convert for altitude). I look forward to shooting at longer distances out to about 600 yards to see what kind of bc I am actually getting.</p><p> </p><p>Of additional interest is Brian Litz's testing that indicates this bullet has a higher bc than listed by Sierra. If I end up losing bc with this bullet, I will also be interested in seeing how large the loss is.</p><p> </p><p>At any rate, I won't be able to continue my testing until the fall. I will report back when I do.</p><p> </p><p>Thank you for sharing your research. It has led me to try things I would not have otherwise considered.</p></blockquote><p></p>
[QUOTE="benchracer, post: 960103, member: 22069"] My initial tests were done at approximately 1000 ft ASL in 70 degree weather with Hodgdon starting loads for Superformance to see if the bullets would stabilize from my rifle. The load workup that I posted was done at 1860 ft ASL in 75 degree weather. I don't have barometric pressure data for either day. According to your calculator, the 69g SMK would be very near borderline (Sg=1.2) at those temps and standard pressure (I don't know how to convert for altitude). I look forward to shooting at longer distances out to about 600 yards to see what kind of bc I am actually getting. Of additional interest is Brian Litz's testing that indicates this bullet has a higher bc than listed by Sierra. If I end up losing bc with this bullet, I will also be interested in seeing how large the loss is. At any rate, I won't be able to continue my testing until the fall. I will report back when I do. Thank you for sharing your research. It has led me to try things I would not have otherwise considered. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
12 Twist 22-250/69g SMK h/t Michael Courtney
Top