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Tennessee Gun Owners Forums
Reloading
7mm PRC Optimal powder charge help... update... I give up!!!!
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<blockquote data-quote="megalomaniac" data-source="post: 5873783" data-attributes="member: 2805"><p>69.5g Retumbo with the 190 a tips would completely blow the primer and prob freeze the case in the chamber in this rifle.</p><p></p><p>That's the issue... I'm getting CRAZY pressure spikes well under book max.</p><p></p><p>Changing powders again isn't going to fix that.</p><p></p><p>I'm used to working up to light pressure signs and backing off... but I'm also getting the velocities. Like in my 300 ultra mag with 200 AB's, I don't get pressure until I push it past 3300 fps. (30 in bbl, so velocities are higher than typical published data). I can't take this PRC rifle much past .308 performance without shaving the raised ejector marks off the brass when I open the sticky bolt.</p></blockquote><p></p>
[QUOTE="megalomaniac, post: 5873783, member: 2805"] 69.5g Retumbo with the 190 a tips would completely blow the primer and prob freeze the case in the chamber in this rifle. That's the issue... I'm getting CRAZY pressure spikes well under book max. Changing powders again isn't going to fix that. I'm used to working up to light pressure signs and backing off... but I'm also getting the velocities. Like in my 300 ultra mag with 200 AB's, I don't get pressure until I push it past 3300 fps. (30 in bbl, so velocities are higher than typical published data). I can't take this PRC rifle much past .308 performance without shaving the raised ejector marks off the brass when I open the sticky bolt. [/QUOTE]
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Tennessee Gun Owners Forums
Reloading
7mm PRC Optimal powder charge help... update... I give up!!!!
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