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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Shocked at how much throat erosion
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<blockquote data-quote="Alan Griffith" data-source="post: 184029" data-attributes="member: 4686"><p>I started shooting my 30-06 Ackley last November 2007. It's has a 26" SS Lilja barrel. My primer count indicated I've put about 700 rounds through it. I've got a great 180 BT/AB load and am currently working on a 200 AB/PT load for Alaska Brownie/Grizzly/Dall. </p><p></p><p>In the process of determing my Partitions distance to the lands, I decided I better see if/how much throat erosion I had. I looked at the original 180 BT/AB data since this is the original bullet I started with. I pulled the original 180 AB from it's primerless case after I remeasured it and compared the measurement w/ the data written on the side of the case. I then ran the same bullet through my process of determing OAL up against the lands. I reseated the bullet to the new OAL and HOLY COW! If I did my measurements and math correctly I've lost .13" in throat. I went back and double checked both the "before" OAL and Length to bearing surface (LtBS), then compared them both to the new OAL and LtBS;----.13"-----.</p><p></p><p>Is this normal? I figured I might get .02 to .04" but not a tenth plus.</p></blockquote><p></p>
[QUOTE="Alan Griffith, post: 184029, member: 4686"] I started shooting my 30-06 Ackley last November 2007. It's has a 26" SS Lilja barrel. My primer count indicated I've put about 700 rounds through it. I've got a great 180 BT/AB load and am currently working on a 200 AB/PT load for Alaska Brownie/Grizzly/Dall. In the process of determing my Partitions distance to the lands, I decided I better see if/how much throat erosion I had. I looked at the original 180 BT/AB data since this is the original bullet I started with. I pulled the original 180 AB from it's primerless case after I remeasured it and compared the measurement w/ the data written on the side of the case. I then ran the same bullet through my process of determing OAL up against the lands. I reseated the bullet to the new OAL and HOLY COW! If I did my measurements and math correctly I've lost .13" in throat. I went back and double checked both the "before" OAL and Length to bearing surface (LtBS), then compared them both to the new OAL and LtBS;----.13"-----. Is this normal? I figured I might get .02 to .04" but not a tenth plus. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Shocked at how much throat erosion
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