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
Rifles, Bullets, Barrels & Ballistics
Help Needed with LB3.0 and .338 Bergers
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="Pdvdh" data-source="post: 397608" data-attributes="member: 4191"><p><strong>Re: More Chronograph Stuff</strong></p><p></p><p>The best way to learn about chronograph capabilities is to run two in tandem. Without that, there is really no way to judge or critique performance. No different than having a single gauge or instrument of most any type. If there's not a second source of data capable of measuring the information that cannot otherwise be sensed by the five human senses, then there's no ability or basis for analysis, interpretation, or validation of the data. My eyes were opened when I began running two at the same time. Over time, I've been able to gain insights on the performance of my two units; and confidence interpretating the data. For example, I'm very confident in the ability to ID flawed data points, simply based on the difference of velocity reported by the two units. Every bullet goes over each unit's skyscreens. Any deviation from typical velocity differences between the two units means one or both units choked. Both units rarely choke at the same time. I only remember one instance - when I switched from an un-braked rifle to a braked rifle. The units were too close to the muzzle blast and both spit out grossly incorrect velocities.</p><p></p><p>With only a single chronograph, you could be collecting good data or bad data. Take your pick. Because there's really nothing else one can do when limited to a sole source of data.</p><p></p><p>Broz,</p><p></p><p>Let us know what your MV is if you're able to shoot over an Oehler? It's probably higher (right where you expected it to be) and the Berger BC is probably lower than initially advertised. Bryan - being an engineer and scientist sort of guy - probably repeated his BC testing every which way, to the point of overkill, prior to releasing the revised .338 Hybrid BC. No way he wants to end up in the position of having to correct a correction with a 2nd notification/update.</p><p></p><p>I let a guy shoot over my chronographs twice after he'd fired 50 rounds over his brand new Shooting Chrony about 2 months ago, as a point of curiousity - he wanted to see how the data from his unit compared to velocity recorded with mine. The two shots he fired over my units were within the range of the 50 MVs he had collected over his. Nothing too scientific, but his Shooting Chrony data seemed reasonable. </p><p></p><p>By the time I develop a load over chronographs and am prepared to move out to 1000 yds, I have sufficient MV data, no matter the different day-to-day lighting conditions, to establish a very representative average MV value. I often even have a pretty good feel of the temperature sensitivity of the load. It's easy to set the units up during load development where I conduct load development (although I'm sure that will not be the case for everyone). Takes an extra 10-15 minutes to set up and take down.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 397608, member: 4191"] [b]Re: More Chronograph Stuff[/b] The best way to learn about chronograph capabilities is to run two in tandem. Without that, there is really no way to judge or critique performance. No different than having a single gauge or instrument of most any type. If there's not a second source of data capable of measuring the information that cannot otherwise be sensed by the five human senses, then there's no ability or basis for analysis, interpretation, or validation of the data. My eyes were opened when I began running two at the same time. Over time, I've been able to gain insights on the performance of my two units; and confidence interpretating the data. For example, I'm very confident in the ability to ID flawed data points, simply based on the difference of velocity reported by the two units. Every bullet goes over each unit's skyscreens. Any deviation from typical velocity differences between the two units means one or both units choked. Both units rarely choke at the same time. I only remember one instance - when I switched from an un-braked rifle to a braked rifle. The units were too close to the muzzle blast and both spit out grossly incorrect velocities. With only a single chronograph, you could be collecting good data or bad data. Take your pick. Because there's really nothing else one can do when limited to a sole source of data. Broz, Let us know what your MV is if you're able to shoot over an Oehler? It's probably higher (right where you expected it to be) and the Berger BC is probably lower than initially advertised. Bryan - being an engineer and scientist sort of guy - probably repeated his BC testing every which way, to the point of overkill, prior to releasing the revised .338 Hybrid BC. No way he wants to end up in the position of having to correct a correction with a 2nd notification/update. I let a guy shoot over my chronographs twice after he'd fired 50 rounds over his brand new Shooting Chrony about 2 months ago, as a point of curiousity - he wanted to see how the data from his unit compared to velocity recorded with mine. The two shots he fired over my units were within the range of the 50 MVs he had collected over his. Nothing too scientific, but his Shooting Chrony data seemed reasonable. By the time I develop a load over chronographs and am prepared to move out to 1000 yds, I have sufficient MV data, no matter the different day-to-day lighting conditions, to establish a very representative average MV value. I often even have a pretty good feel of the temperature sensitivity of the load. It's easy to set the units up during load development where I conduct load development (although I'm sure that will not be the case for everyone). Takes an extra 10-15 minutes to set up and take down. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Help Needed with LB3.0 and .338 Bergers
Top