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Rifles, Reloading, Optics, Equipment
Reloading
Freebore?
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<blockquote data-quote="BallisticsGuy" data-source="post: 1746174" data-attributes="member: 96226"><p>Some rifles like exceptionally long jumps, some like short jumps. Some are built for heavy hunting bullets, some for other stuff. Just this year while I was hunting the landowner was complaining that he'd loaded up a bunch of ammo for one of his .308's and it was fine but he put them in another .308 and the primers popped out and it wouldn't group. He was worried about having to tear them all down. I knew instantly that in one rifle it was jamming and in the other it was jumping. So I grabbed 5 of them and shortened them about .020" then we took them out and tried again. Primers showed no pressure signs and the rounds grouped in cloverleafs. The difference between the two rifles was one is a thin barreled hunting rifle and the other was a precision heavy barrel tactical rifle. The hunting rifle was throated for round nose bullets. The tactical rifle for VLD's. Seating depth and jam/jump are big contributors to how the pressure curve shapes out.</p></blockquote><p></p>
[QUOTE="BallisticsGuy, post: 1746174, member: 96226"] Some rifles like exceptionally long jumps, some like short jumps. Some are built for heavy hunting bullets, some for other stuff. Just this year while I was hunting the landowner was complaining that he'd loaded up a bunch of ammo for one of his .308's and it was fine but he put them in another .308 and the primers popped out and it wouldn't group. He was worried about having to tear them all down. I knew instantly that in one rifle it was jamming and in the other it was jumping. So I grabbed 5 of them and shortened them about .020" then we took them out and tried again. Primers showed no pressure signs and the rounds grouped in cloverleafs. The difference between the two rifles was one is a thin barreled hunting rifle and the other was a precision heavy barrel tactical rifle. The hunting rifle was throated for round nose bullets. The tactical rifle for VLD's. Seating depth and jam/jump are big contributors to how the pressure curve shapes out. [/QUOTE]
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