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
7mm STW Velocity
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="TMR" data-source="post: 114850" data-attributes="member: 5819"><p>[ QUOTE ]</p><p>82.5 grains of H1000 with a 168 grain bullet /ubbthreads/images/graemlins/shocked.gif</p><p></p><p>That's a hot load. It HAS to be past max...pressure sign or not.</p><p></p><p>Was that new brass? </p><p></p><p>[/ QUOTE ]</p><p></p><p>It is with new Winchester brass. I also shot some with some fired Win brass. It is about 1 grain over max according to Barnes. I measured the cases before and after firing....no change. Primer pockets are still tight. I contacted a Hodgon tech last week and asked him about the load data they had.....I saw where some guys were running 83.5 grains with a 160 grain bullet, he said their data was pretty conservative. They show 80.7 grains H1000 = 51,500psi with a 160gr. The STW max is 65,000 psi. I imagine their are lots of variables between rifles. My rifle has .220" freebore. If the bullets could get to the lands, the 80.7 or less might be the max. I am very cautious when reloading. I have seen bolts come flying out and actions blowup(mainly on a homemade 50 cal by a local smith). In the reading I have done on this forum and others, if there is no case head expansion, the bolt lifts easily, and the primer pockets are tight, you should be ok. I am using Fed 215M primers, which flatten out easily. My minimum loads sometimes flatten them out. I put in some WLRM primers and they looked perfect. They are a little harder from what I have been told.</p><p></p><p>The Load that 300Win listed above with IMR7828....IMR lists 76.0 grain max with 62,300 psi. I am not sure what a grain increase equates into psi gain. I think it is always best to start below the manufacturers max and work your way up. Every gun will be different. We have a Kimber 300wsm that reaches max before our Shilen barreled 300WSM. It also gets 100fps faster with a 2" shorter barrel and less powder. It comes down to the barrel and chamber.</p></blockquote><p></p>
[QUOTE="TMR, post: 114850, member: 5819"] [ QUOTE ] 82.5 grains of H1000 with a 168 grain bullet [img]/ubbthreads/images/graemlins/shocked.gif[/img] That's a hot load. It HAS to be past max...pressure sign or not. Was that new brass? [/ QUOTE ] It is with new Winchester brass. I also shot some with some fired Win brass. It is about 1 grain over max according to Barnes. I measured the cases before and after firing....no change. Primer pockets are still tight. I contacted a Hodgon tech last week and asked him about the load data they had.....I saw where some guys were running 83.5 grains with a 160 grain bullet, he said their data was pretty conservative. They show 80.7 grains H1000 = 51,500psi with a 160gr. The STW max is 65,000 psi. I imagine their are lots of variables between rifles. My rifle has .220" freebore. If the bullets could get to the lands, the 80.7 or less might be the max. I am very cautious when reloading. I have seen bolts come flying out and actions blowup(mainly on a homemade 50 cal by a local smith). In the reading I have done on this forum and others, if there is no case head expansion, the bolt lifts easily, and the primer pockets are tight, you should be ok. I am using Fed 215M primers, which flatten out easily. My minimum loads sometimes flatten them out. I put in some WLRM primers and they looked perfect. They are a little harder from what I have been told. The Load that 300Win listed above with IMR7828....IMR lists 76.0 grain max with 62,300 psi. I am not sure what a grain increase equates into psi gain. I think it is always best to start below the manufacturers max and work your way up. Every gun will be different. We have a Kimber 300wsm that reaches max before our Shilen barreled 300WSM. It also gets 100fps faster with a 2" shorter barrel and less powder. It comes down to the barrel and chamber. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm STW Velocity
Top