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
Hunting
Long Range Hunting & Shooting
338 Allen Xpress, RL33 load development
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="Fiftydriver" data-source="post: 1044211" data-attributes="member: 10"><p>NZ LongRanger,</p><p> </p><p>That is very interested test results. The more I place with RL33, the more I like it. That said, the more I play with it, the more I am impressed with it in the smaller caliber rounds such as my 300 AX and 7mm AM where it shows even better performance gains.</p><p> </p><p>I have tested some 338 AX rifles(very similar to your 338 Lapua AI) which showed nearly a 100 fps advantage over top loads with Retumbo but on average, looking over results of roughly 30 rifles in this chambering since I have started using RL33, I would say the average increased velocity will be in the 60-70 fps range most of the time, certainly significant performance gains. </p><p> </p><p>Need a bit more powder to do it but that just increases load density. I have found that I prefer RL33 in rifles with very long throats. It works great in both but its a bulky powder and works best with a bit more case capacity. Have found that final velocity results comparing a short throat and long throated 338 AX are not all that different, just that the shorter throat length has a higher load density and a bit more powder crunching then I like to see when seating bullets.</p><p> </p><p>The nice thing I have found in my 7mm AM is that I can match my Retumbo loads with the 180 gr berger Hybrid target bullet at 3400 fps but do so with significantly lower pressure signs on the case. With the retumbo load, I can get this 3400 fps in 28" barrel lengths or longer pretty easily but you will see a slight ejector ring on the case head. With the RL33 loads, I can get the exact same 3400 fps and no ejector ring on case head. I could get more but 3400 fps with a berger is plenty fast, in fact asking a lot from that bullet with impacts inside 400 yards anyway!!!</p><p> </p><p>Great testing and report, thanks for sharing your data!!! I have always said that RL33 seemed to do everything that N570 will do but with what seems to be less bore heat.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 1044211, member: 10"] NZ LongRanger, That is very interested test results. The more I place with RL33, the more I like it. That said, the more I play with it, the more I am impressed with it in the smaller caliber rounds such as my 300 AX and 7mm AM where it shows even better performance gains. I have tested some 338 AX rifles(very similar to your 338 Lapua AI) which showed nearly a 100 fps advantage over top loads with Retumbo but on average, looking over results of roughly 30 rifles in this chambering since I have started using RL33, I would say the average increased velocity will be in the 60-70 fps range most of the time, certainly significant performance gains. Need a bit more powder to do it but that just increases load density. I have found that I prefer RL33 in rifles with very long throats. It works great in both but its a bulky powder and works best with a bit more case capacity. Have found that final velocity results comparing a short throat and long throated 338 AX are not all that different, just that the shorter throat length has a higher load density and a bit more powder crunching then I like to see when seating bullets. The nice thing I have found in my 7mm AM is that I can match my Retumbo loads with the 180 gr berger Hybrid target bullet at 3400 fps but do so with significantly lower pressure signs on the case. With the retumbo load, I can get this 3400 fps in 28" barrel lengths or longer pretty easily but you will see a slight ejector ring on the case head. With the RL33 loads, I can get the exact same 3400 fps and no ejector ring on case head. I could get more but 3400 fps with a berger is plenty fast, in fact asking a lot from that bullet with impacts inside 400 yards anyway!!! Great testing and report, thanks for sharing your data!!! I have always said that RL33 seemed to do everything that N570 will do but with what seems to be less bore heat. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
338 Allen Xpress, RL33 load development
Top