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
284 Thor Progress
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="Coyboy" data-source="post: 494844" data-attributes="member: 3733"><p>Just for clarification; how are you measuring your groups? .512" on the picture is a bit off, you need to measure center to center, or out side to out side and then subtract .284" from that.</p><p></p><p>On you ES and vel.</p><p></p><p>New barrels take some time to settle in. Typically they will increase in velocity over the first 40-80 rounds, depending some on the barrels manf. and cartige choice.</p><p></p><p>Also your ES should be a little high just from the fact of the constant cleaning you are doing to brake the barrel in, is changing with each shot the internal caracteristics of the bore.</p><p></p><p>My feeling is most guys would be best served to find a load that is a bit off of max and reasonably accurate. Either from past experience with a particular chambering and bullet, or from advice of a RELIABLE mentor. Load up 50-100 rounds and proceed to shoot them and shoot the barrel in. (also include whatever "brake-in" you believe in) At the end of 100 you should have a good stable velocity that has leveled off and is predictable. From there judge that loads accuracy, and tweak it for maximum performance in both accuracy and velocity.</p><p></p><p>Many times we mess with different loads too early in the barrels life. I have had loads that I developed in less than 20 rounds thru the gun. loaded up 100 of them and at the end of the 100 was showing pressure signs and velocitys over 80 fps faster than original development data.</p><p></p><p>My recent 6mmbr is a good example, first shots fired were 2825 ave. with 31 grains of varget. Now after 60 rounds 30.5 varget has them at 2852 ave.</p></blockquote><p></p>
[QUOTE="Coyboy, post: 494844, member: 3733"] Just for clarification; how are you measuring your groups? .512" on the picture is a bit off, you need to measure center to center, or out side to out side and then subtract .284" from that. On you ES and vel. New barrels take some time to settle in. Typically they will increase in velocity over the first 40-80 rounds, depending some on the barrels manf. and cartige choice. Also your ES should be a little high just from the fact of the constant cleaning you are doing to brake the barrel in, is changing with each shot the internal caracteristics of the bore. My feeling is most guys would be best served to find a load that is a bit off of max and reasonably accurate. Either from past experience with a particular chambering and bullet, or from advice of a RELIABLE mentor. Load up 50-100 rounds and proceed to shoot them and shoot the barrel in. (also include whatever "brake-in" you believe in) At the end of 100 you should have a good stable velocity that has leveled off and is predictable. From there judge that loads accuracy, and tweak it for maximum performance in both accuracy and velocity. Many times we mess with different loads too early in the barrels life. I have had loads that I developed in less than 20 rounds thru the gun. loaded up 100 of them and at the end of the 100 was showing pressure signs and velocitys over 80 fps faster than original development data. My recent 6mmbr is a good example, first shots fired were 2825 ave. with 31 grains of varget. Now after 60 rounds 30.5 varget has them at 2852 ave. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
284 Thor Progress
Top