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
Substituting powder and gas checks
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="Lefty7mmstw" data-source="post: 829452" data-attributes="member: 48043"><p>The gas check isn't the problem here; it is the strength of the alloy. I'm getting to 2000 fps with my 375 h@h with a 280grain gas checked pill and getting just over moa with it. I don't know how much further I want to push the alloy I'm shooting as it is simply melted magnum grade bird shot. You want to get the lead to obdurate(fill the bore) but not overcome the strength of the alloy as it will deform the bullet and lead the bore.</p><p>When you are shooting a lead bullet(especially a gas checked pill) in any cal with a shoulder you don't want to drop the heel of the gas check below the base of the neck proper. If you expose lead you may either blow the check loose or gas etch the lead itself and the group will be blown.</p><p>As far as using another powder it is often best to ask for data on reputable sites like this, and cross reference with other powders with similar burning ranges that you do have data for. I've done a good bit of working up loads with mil surp. powders and often wring out a powder or cal. before data comes out. Watch your butt and start 15% to 20% below where you think you will land if you can get by with that low of a start. If not (as in a really overbore round where 10% down is a low start) I'd grab a flak jacket and rubber undies for your first trip to the range as you will likely need both.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 829452, member: 48043"] The gas check isn't the problem here; it is the strength of the alloy. I'm getting to 2000 fps with my 375 h@h with a 280grain gas checked pill and getting just over moa with it. I don't know how much further I want to push the alloy I'm shooting as it is simply melted magnum grade bird shot. You want to get the lead to obdurate(fill the bore) but not overcome the strength of the alloy as it will deform the bullet and lead the bore. When you are shooting a lead bullet(especially a gas checked pill) in any cal with a shoulder you don't want to drop the heel of the gas check below the base of the neck proper. If you expose lead you may either blow the check loose or gas etch the lead itself and the group will be blown. As far as using another powder it is often best to ask for data on reputable sites like this, and cross reference with other powders with similar burning ranges that you do have data for. I've done a good bit of working up loads with mil surp. powders and often wring out a powder or cal. before data comes out. Watch your butt and start 15% to 20% below where you think you will land if you can get by with that low of a start. If not (as in a really overbore round where 10% down is a low start) I'd grab a flak jacket and rubber undies for your first trip to the range as you will likely need both. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Substituting powder and gas checks
Top