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
Help - developing 7mm stw load - questions
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="orwapitihunter" data-source="post: 573636" data-attributes="member: 1939"><p>I have played with two different 7 STW's. The first was nothing more than a parts gun put together with a 26" take off Sendero barrel. That rifle has a long throat and with the 162 Amax seated to just off the lands my oal is in the 3.9" neighborhood. I use IMR 7828 to push those Amaxes at 3240. I found the max listed load in my manual resulted in a gain of about 70 fps over my 24" barrel 7 RM. So I slowly worked up over book max, watching velocity and for the typical signs of excessive pressure. I started to get a bit of increased bolt lift at 2 grains over the load I settled on. The MV also stopped increasing at a linear rate at about the load I chose and then jumped up to about 3300 at the point of increased bolt lift. I have been shooting this load for quite awhile now and my W-W brass has shown no ill effects after 6 or 7 firings. This load also shoots in the .3s with regularity.</p><p></p><p>The second STW was built on a Stevens 200 that I lengthened and tubed with a 26" factory Savage varmint weight barrel. I used some Sierra 168 SMKs and H1000 with R-P brass for break in loads for that rifle. I never cronographed any of those loads as I just loaded 40 rounds for a baseline, and then made changes to the rifle to see what differences they would make (things like bedding, and recrowning). I did end up with that rifle shooting that random load into 1/2 moa at 500 yrds.</p><p></p><p>So I would say from my limited experiences that good accuracy isn't too hard to find, and at least some of the loading data doesn't fit well to all rifles. Work up carefully!</p></blockquote><p></p>
[QUOTE="orwapitihunter, post: 573636, member: 1939"] I have played with two different 7 STW's. The first was nothing more than a parts gun put together with a 26" take off Sendero barrel. That rifle has a long throat and with the 162 Amax seated to just off the lands my oal is in the 3.9" neighborhood. I use IMR 7828 to push those Amaxes at 3240. I found the max listed load in my manual resulted in a gain of about 70 fps over my 24" barrel 7 RM. So I slowly worked up over book max, watching velocity and for the typical signs of excessive pressure. I started to get a bit of increased bolt lift at 2 grains over the load I settled on. The MV also stopped increasing at a linear rate at about the load I chose and then jumped up to about 3300 at the point of increased bolt lift. I have been shooting this load for quite awhile now and my W-W brass has shown no ill effects after 6 or 7 firings. This load also shoots in the .3s with regularity. The second STW was built on a Stevens 200 that I lengthened and tubed with a 26" factory Savage varmint weight barrel. I used some Sierra 168 SMKs and H1000 with R-P brass for break in loads for that rifle. I never cronographed any of those loads as I just loaded 40 rounds for a baseline, and then made changes to the rifle to see what differences they would make (things like bedding, and recrowning). I did end up with that rifle shooting that random load into 1/2 moa at 500 yrds. So I would say from my limited experiences that good accuracy isn't too hard to find, and at least some of the loading data doesn't fit well to all rifles. Work up carefully! [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Help - developing 7mm stw load - questions
Top