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Rifles, Reloading, Optics, Equipment
Reloading
Same load throughout the life of a barrell?
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<blockquote data-quote="johnnyk" data-source="post: 344989" data-attributes="member: 307"><p>I change bullets in all of my rifles all the time. Depends on what I'm hunting or if I just want to try another bullet or powder. I always check the OAL with the Stoney Point gauge and I try to seat every bullet at .010" off the lands. This is probably not the perfect distance for every bullet, especially the Bergers, but it has proven to be a good place to start for me over the years. Most of the time I leave my seating die set to that OAL, until I notice a change in accuracy. First thing I do is check the velocity and if that's the same I check the OAL with the gauge.</p><p> Depending on the amount and frequency of shooting done, the throat does erode. "Chasing the lands" is merely adjusting the OAL to find that sweet spot again.</p><p> On the first 7mmRM Sendero that I owned I noticied at the end of that barrels life that it started to do some freaky things. I don't have any scientific evidence to base this on only what I experienced. It would occasionally throw a shot. There was no way I could tell which shot would go astray or why it did. At the time I didn't own a chrono so I could measure the speed. I reckoned that the barrel was "loosing pressure" due to wear but like I said I don't have enough knowledge in that area to make a proven statement. The rifle was extremely accurate and easy to clean up until about 12 to 1300 rounds (best recollection). Hope this helps. JohnnyK.</p></blockquote><p></p>
[QUOTE="johnnyk, post: 344989, member: 307"] I change bullets in all of my rifles all the time. Depends on what I'm hunting or if I just want to try another bullet or powder. I always check the OAL with the Stoney Point gauge and I try to seat every bullet at .010" off the lands. This is probably not the perfect distance for every bullet, especially the Bergers, but it has proven to be a good place to start for me over the years. Most of the time I leave my seating die set to that OAL, until I notice a change in accuracy. First thing I do is check the velocity and if that's the same I check the OAL with the gauge. Depending on the amount and frequency of shooting done, the throat does erode. "Chasing the lands" is merely adjusting the OAL to find that sweet spot again. On the first 7mmRM Sendero that I owned I noticied at the end of that barrels life that it started to do some freaky things. I don't have any scientific evidence to base this on only what I experienced. It would occasionally throw a shot. There was no way I could tell which shot would go astray or why it did. At the time I didn't own a chrono so I could measure the speed. I reckoned that the barrel was "loosing pressure" due to wear but like I said I don't have enough knowledge in that area to make a proven statement. The rifle was extremely accurate and easy to clean up until about 12 to 1300 rounds (best recollection). Hope this helps. JohnnyK. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Same load throughout the life of a barrell?
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