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
Group Pattern Question
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="Stammster" data-source="post: 2322479" data-attributes="member: 114381"><p>Yep, saw that comment also...but original post was more around being at 46gr and concerned about possible pressure. Then he clarified later. But here is still my take:</p><p>1.) Soot around necks happens with RL26. In fact it gets worse at low pressure, not high pressure as the brass doesn't seal properly.</p><p>2.) Depending on the firing pin and boltface hole size, cratered primers are not a good indicator of pressure. Especially in Rem actions. Not sure about yours.</p><p>3.). Depending on primer type, size, and mfg, flat primers are not always a good indicator of pressure. In fact, all my WLR primers using RL26 are flat...even those at <50kpsi.</p><p></p><p>Case capacity just effects the pressure vs charge weight. If he thinks the Lapua brass has lower capacity, then he should see higher velocities and pressures for a given charge weight - not just higher pressures.</p><p></p><p>I realize every gun is different...but come on. 2735 fps with RL26 in a 24" bbl with 143s seem slow to me and I'm sure others will agree. Thus the comment I believe the OP is possibly misreading pressure signs. Got to be sure of the chrono reading though.</p><p></p><p>When I am looking for a good shooting node, I also often see what he sees. 3-4 in one hole and then 1 flyer. On the chrono, the flyer turns out to be 15-20 fps slower. Taking it out of the sweet spot to a different POI. Increase charge weight by 0.2-0.3 gr and see what happens. He's not going to blow his face off.</p><p></p><p>In bolt guns, bolt lift is a much better indicator of pressure. No mention of that.</p></blockquote><p></p>
[QUOTE="Stammster, post: 2322479, member: 114381"] Yep, saw that comment also...but original post was more around being at 46gr and concerned about possible pressure. Then he clarified later. But here is still my take: 1.) Soot around necks happens with RL26. In fact it gets worse at low pressure, not high pressure as the brass doesn’t seal properly. 2.) Depending on the firing pin and boltface hole size, cratered primers are not a good indicator of pressure. Especially in Rem actions. Not sure about yours. 3.). Depending on primer type, size, and mfg, flat primers are not always a good indicator of pressure. In fact, all my WLR primers using RL26 are flat...even those at <50kpsi. Case capacity just effects the pressure vs charge weight. If he thinks the Lapua brass has lower capacity, then he should see higher velocities and pressures for a given charge weight - not just higher pressures. I realize every gun is different...but come on. 2735 fps with RL26 in a 24” bbl with 143s seem slow to me and I’m sure others will agree. Thus the comment I believe the OP is possibly misreading pressure signs. Got to be sure of the chrono reading though. When I am looking for a good shooting node, I also often see what he sees. 3-4 in one hole and then 1 flyer. On the chrono, the flyer turns out to be 15-20 fps slower. Taking it out of the sweet spot to a different POI. Increase charge weight by 0.2-0.3 gr and see what happens. He’s not going to blow his face off. In bolt guns, bolt lift is a much better indicator of pressure. No mention of that. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Group Pattern Question
Top