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Rifles, Reloading, Optics, Equipment
Reloading
Even Factory ammo can be over pressure!
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<blockquote data-quote="MagnumManiac" data-source="post: 2120614" data-attributes="member: 10755"><p>I have a pressure trace that I use when developing loads and I have enough factory and custom barrels to know that it's just not pressure equals velocity.</p><p>Groove width and number make a difference on speed with the SAME pressure.</p><p>For example, my 4 groove 300WM is roughly 100fps faster than my 6 groove barrel at the SAME pressure.</p><p>I used to believe x amount of pressure produced y amount of velocity across all barrels...it ain't that simple.</p><p></p><p>Yes, custom barrels and chambers CAN produce higher pressure because they are tighter in tolerance.</p><p></p><p>I can't run max book loads in my 264WM due to it being tight in the bore, which is how I ordered it, and I also used a minimum match chamber reamer. I save on powder anyway doing this, takes less to get the same pressure and velocity is way up there too. 29" barrel helps a lot as well. Lol.</p><p>I bet I couldn't run factory ammo in this rifle.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2120614, member: 10755"] I have a pressure trace that I use when developing loads and I have enough factory and custom barrels to know that it’s just not pressure equals velocity. Groove width and number make a difference on speed with the SAME pressure. For example, my 4 groove 300WM is roughly 100fps faster than my 6 groove barrel at the SAME pressure. I used to believe x amount of pressure produced y amount of velocity across all barrels...it ain’t that simple. Yes, custom barrels and chambers CAN produce higher pressure because they are tighter in tolerance. I can’t run max book loads in my 264WM due to it being tight in the bore, which is how I ordered it, and I also used a minimum match chamber reamer. I save on powder anyway doing this, takes less to get the same pressure and velocity is way up there too. 29” barrel helps a lot as well. Lol. I bet I couldn’t run factory ammo in this rifle. Cheers. [/QUOTE]
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Reloading
Even Factory ammo can be over pressure!
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