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
Hunting
Long Range Hunting & Shooting
270-300 Win Mag now feasible
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="jhfleming" data-source="post: 1198560" data-attributes="member: 45443"><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Best data I could find was, RL-25 assuming 160 gr bullet, for 270 Wby Mag, Pressure test loads (1 ea) 68.2, 69.7, 70.5, 71.1. Accuracy test: 69.5, 69.9, 70.2, 70.6, 70.9, 71.1., I shoot 5 shot groups, recording speed, and MOA.</span></span></p><p></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">When starting with an established cartridge I go to Nosler's site and get their load data for the bullet weight I will use and start with the powder that they say yields the most accurate results.</span></span></p><p></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">I plug that data, max load, into an Excel spreadsheet I have developed and it calculates the pressure test loads and accuracy loads automatically. The sheet also has a section for listing all the critical load data as well as test results and calculates average speed and SD, once the recorded speeds have been loaded in. I manually input MOA for best 3 shots and all 5 shots, because my shooting ability is usually the biggest variable. After the initial accuracy test I take the most accurate load, with highest speed, and load +/- 0.2 grains on each side in 0.1 grain increments to zero in on the best load. So if most accurate was 70.5 I would load 70.3, .4, .5, .6 & .7 and retest.</span></span></p><p></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">If you have Microsoft Excel I can clean up a spreadsheet and send it to you if you like, it may take a couple of days though. It has room for all the relative variables that you need to be able to repeat the load for future use.</span></span></p><p></p><p><span style="font-family: 'Times New Roman'"><span style="font-size: 12px">Using this method I was able to confirm 1/4 MOA load with only 70 rounds and 2 trips to the range for a factory stock Browning 300 WSM, surprised the heck out of me.</span></span></p></blockquote><p></p>
[QUOTE="jhfleming, post: 1198560, member: 45443"] [FONT=Times New Roman][SIZE=3]Best data I could find was, RL-25 assuming 160 gr bullet, for 270 Wby Mag, Pressure test loads (1 ea) 68.2, 69.7, 70.5, 71.1. Accuracy test: 69.5, 69.9, 70.2, 70.6, 70.9, 71.1., I shoot 5 shot groups, recording speed, and MOA.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]When starting with an established cartridge I go to Nosler's site and get their load data for the bullet weight I will use and start with the powder that they say yields the most accurate results.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]I plug that data, max load, into an Excel spreadsheet I have developed and it calculates the pressure test loads and accuracy loads automatically. The sheet also has a section for listing all the critical load data as well as test results and calculates average speed and SD, once the recorded speeds have been loaded in. I manually input MOA for best 3 shots and all 5 shots, because my shooting ability is usually the biggest variable. After the initial accuracy test I take the most accurate load, with highest speed, and load +/- 0.2 grains on each side in 0.1 grain increments to zero in on the best load. So if most accurate was 70.5 I would load 70.3, .4, .5, .6 & .7 and retest.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]If you have Microsoft Excel I can clean up a spreadsheet and send it to you if you like, it may take a couple of days though. It has room for all the relative variables that you need to be able to repeat the load for future use.[/SIZE][/FONT] [FONT=Times New Roman][SIZE=3]Using this method I was able to confirm 1/4 MOA load with only 70 rounds and 2 trips to the range for a factory stock Browning 300 WSM, surprised the heck out of me.[/SIZE][/FONT] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
270-300 Win Mag now feasible
Top