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
HBN Bullet Coating
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="ChrisInKY" data-source="post: 2958283" data-attributes="member: 94377"><p>Brother, I can only say what my personal chronograph recorded and what I put into my notes on a given day. I remember shooting across the chronograph just to see that difference first-hand. As "memory serves" it was right about 50 fps on the .338 on back-to-back shots in both directions (HBN --> Uncoated | Uncoated --> HBN). The important step people 'might' overlook is that I cleaned (at least I tried) all of the HBN out of the barrel when I reversed direction. It was a memory note ... not something I documented.</p><p></p><p>If it was me looking at that data above, the <img class="smilie smilie--emoji" loading="lazy" alt="😲" title="Astonished face :astonished:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f632.png" data-shortname=":astonished:" /> is at the ES/SD.</p><p></p><p>I recorded three groups of HBN coated .338 on that day. This was the in-betweener:</p><p>[ATTACH=full]515096[/ATTACH]</p><p>I wish I kept the pictures of the holes those groups made. I stopped after they started to 'open up' from a ragged hole to a very tight cloverleaf. I honestly thought it was heat that caused the dispersion.</p><p></p><p>Other takeaways from what I posted: The side-by-sides are data that is years apart though the primers and powder probably came from the same brick and keg pallet. The bullets are definitely from the same order, but I weight sort and that could have caused some variance. Can't say it was the same chronograph between old and new <img class="smilie smilie--emoji" loading="lazy" alt="😲" title="Astonished face :astonished:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f632.png" data-shortname=":astonished:" /><img class="smilie smilie--emoji" loading="lazy" alt="🤣" title="Rolling on the floor laughing :rofl:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f923.png" data-shortname=":rofl:" />. Sunlight might have thrown the chronograph a bit or it might have been off-positioned enough to cause a variation too. The chronograph sits about 17 meters from the muzzle.</p><p></p><p>I never shoot un-coated bullets anymore, so records of those 5-shot groups is all the data I will ever have to share.</p></blockquote><p></p>
[QUOTE="ChrisInKY, post: 2958283, member: 94377"] Brother, I can only say what my personal chronograph recorded and what I put into my notes on a given day. I remember shooting across the chronograph just to see that difference first-hand. As "memory serves" it was right about 50 fps on the .338 on back-to-back shots in both directions (HBN --> Uncoated | Uncoated --> HBN). The important step people 'might' overlook is that I cleaned (at least I tried) all of the HBN out of the barrel when I reversed direction. It was a memory note ... not something I documented. If it was me looking at that data above, the 😲 is at the ES/SD. I recorded three groups of HBN coated .338 on that day. This was the in-betweener: [ATTACH type="full"]515096[/ATTACH] I wish I kept the pictures of the holes those groups made. I stopped after they started to 'open up' from a ragged hole to a very tight cloverleaf. I honestly thought it was heat that caused the dispersion. Other takeaways from what I posted: The side-by-sides are data that is years apart though the primers and powder probably came from the same brick and keg pallet. The bullets are definitely from the same order, but I weight sort and that could have caused some variance. Can't say it was the same chronograph between old and new 😲🤣. Sunlight might have thrown the chronograph a bit or it might have been off-positioned enough to cause a variation too. The chronograph sits about 17 meters from the muzzle. I never shoot un-coated bullets anymore, so records of those 5-shot groups is all the data I will ever have to share. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
HBN Bullet Coating
Top