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
7mm RM and H 1000
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="bruce_ventura" data-source="post: 1076583" data-attributes="member: 34084"><p>Just to clarify, I'm not a proponent of running hot loads because it shortens brass and barrel life. </p><p></p><p>That said, I'm not convinced you're near max load either. The muzzle velocity is high, but not for a 27.5" barrel. I think you should re-check your balance and chronograph data. If you have a calibration weight, check your balance. Try a different chrono. </p><p></p><p>You've mentioned primer cratering a couple of times. That's not one of the pressure signs I typically look for. It happens at low pressure with some rifles and not others. Flattening of the primer is a better indicator to me, along with tool marks on the base and sticky bolt lift. If I really want to know, I measure the base diameter on a new case with a micrometer before and after firing. When the base deforms after firing, the load is too hot. </p><p></p><p>There are aren't a lot of reasons why you could be seeing pressure signs at such a low charge weight. No bullet jump and/or undersized barrel bore could do it. dwm also mentioned headspace. It could be a combination of effects.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 1076583, member: 34084"] Just to clarify, I'm not a proponent of running hot loads because it shortens brass and barrel life. That said, I'm not convinced you're near max load either. The muzzle velocity is high, but not for a 27.5" barrel. I think you should re-check your balance and chronograph data. If you have a calibration weight, check your balance. Try a different chrono. You've mentioned primer cratering a couple of times. That's not one of the pressure signs I typically look for. It happens at low pressure with some rifles and not others. Flattening of the primer is a better indicator to me, along with tool marks on the base and sticky bolt lift. If I really want to know, I measure the base diameter on a new case with a micrometer before and after firing. When the base deforms after firing, the load is too hot. There are aren't a lot of reasons why you could be seeing pressure signs at such a low charge weight. No bullet jump and/or undersized barrel bore could do it. dwm also mentioned headspace. It could be a combination of effects. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
7mm RM and H 1000
Top