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
What could cause group outliers?
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="emp1953" data-source="post: 2744479" data-attributes="member: 71817"><p>I would leave the primer alone for now. On 3 occassions where I had an errant flier out of every group It was always one that was after number 1 and 2. I have several rifles that have either interal box magazines or removable magazines and also a Ruger #1 single shot. I had the flier issuer with two (very light) .270win rifles and one standard older Remington 700BDL in 30-06. I quickly got to the bottom of it by shooting the same rounds through the Ruger #1. 10 shots in a row allowing 2-3 minutes between shots, made a less than 3/4 moa group at 100yds while through the two bolt rifles I'd have 1 out of 5 a flier. Here's my steps to find the culprit. Noting the success with the Ruger #1 and the differences in the action. So I took both .270win rifles and manually fed each round, rather than loading the magazine. Lo and behold the flier disappeared completely. I had pulled rounds apart, verified charge weights using several scales, verified bullet weights and measurements and brass length. Then I loaded up the magazine with rounds that I had numbered 2-4 with a sharpie (#1 was in the chamber for 5 total rounds), Each shot I would remove each round from the magazine and measure the overall length. Put them back in the same order and finished. I found that after shot 2 the length of the rounds was increasing, some more than others. I had occasionally experience difficulty feeding issues once in a while which I now attribute to this discovery. Recoil in the light rifles was causing bullets to jump forward thus lenghtening their OAL. This changes the distances to the lands thus changing my point of impact. So I started annealing my case necks and neck tension on the bullets never loosened up again. No more fliers, a simple fix but a tedious troubleshooting process.</p></blockquote><p></p>
[QUOTE="emp1953, post: 2744479, member: 71817"] I would leave the primer alone for now. On 3 occassions where I had an errant flier out of every group It was always one that was after number 1 and 2. I have several rifles that have either interal box magazines or removable magazines and also a Ruger #1 single shot. I had the flier issuer with two (very light) .270win rifles and one standard older Remington 700BDL in 30-06. I quickly got to the bottom of it by shooting the same rounds through the Ruger #1. 10 shots in a row allowing 2-3 minutes between shots, made a less than 3/4 moa group at 100yds while through the two bolt rifles I'd have 1 out of 5 a flier. Here's my steps to find the culprit. Noting the success with the Ruger #1 and the differences in the action. So I took both .270win rifles and manually fed each round, rather than loading the magazine. Lo and behold the flier disappeared completely. I had pulled rounds apart, verified charge weights using several scales, verified bullet weights and measurements and brass length. Then I loaded up the magazine with rounds that I had numbered 2-4 with a sharpie (#1 was in the chamber for 5 total rounds), Each shot I would remove each round from the magazine and measure the overall length. Put them back in the same order and finished. I found that after shot 2 the length of the rounds was increasing, some more than others. I had occasionally experience difficulty feeding issues once in a while which I now attribute to this discovery. Recoil in the light rifles was causing bullets to jump forward thus lenghtening their OAL. This changes the distances to the lands thus changing my point of impact. So I started annealing my case necks and neck tension on the bullets never loosened up again. No more fliers, a simple fix but a tedious troubleshooting process. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
What could cause group outliers?
Top