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Rifles, Reloading, Optics, Equipment
Reloading
Barrel life
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<blockquote data-quote="VinceMule" data-source="post: 2801596" data-attributes="member: 122164"><p>The "Heat Index" of the powder used has a particular outcome in the amount of fire cracking, throat dia growth, and freebore growth.</p><p></p><p>AA2700</p><p>N160</p><p>N165</p><p>H1000</p><p></p><p>all burn much cooler than some other powders, and H1000 is a proven life extender in the 264 Winchester Magnum.</p><p></p><p>For a guy that only hunts, and verifies zero, a barrel may outlast his lifetime. For the guy that likes to shoot steel, he wears out barrels 3x as fast as a guy that does not shoot steel.</p><p></p><p>I have been shooting 7 Mags all my life, Remingtons, Browning A Bolts, BARs, and one Savage 116, various brands of custom barrels used. Most of what I have shot in the 7 Mags have been R#22 and IMR 4350 with pressures at the very top end of the load where it is the most accurate. One load with 150g-154g bullets is with R#25 with a Win mag primer is at 3240 fps with sub 10 fps ES, but barrel life with this load I figure is 600-800? rounds at the 3/8"(3 shot) accuracy I am looking for. This load with R#25 will have some major fire cracking in the barrel for 10", and I attribute that to the amount of powder used.</p><p></p><p>Bug hole Loads were found quickly with IMR 4350(140g), R#22(160g), and R#25(150-154g), so I am reluctant to switch to the cooler burning powders. Brux and Krieger barrel blanks are waiting their turn.</p><p></p><p>Quiet Texan's advice was spot on! I have found in my varmint rifles that Pre Fits done by a gunsmith that takes his time indicating the barrel in, and shoots amazing. I am convinced that the part of the chambering process where the barrel is indicated into the .0001 is where MUCH accuracy is attained, and I can not stress this enough.</p><p></p><p>So, now I think in terms of building a "platform", which includes Stock, trigger, action, scope, and change barrels/calibers as necessary. Putting together a Platform is a LOT less expensive than having a multitude of rifles, and buying components with the money you save. These "platforms" are so incredibly accurate that when the groups open to 1/2"-5/8", I am looking for something wrong. The Key is to find that gunsmith that will indicate that the barrel in properly. Accuracy just falls in quickly with a properly indicated in barrel, especially with a caliber you are accustomed to.</p></blockquote><p></p>
[QUOTE="VinceMule, post: 2801596, member: 122164"] The "Heat Index" of the powder used has a particular outcome in the amount of fire cracking, throat dia growth, and freebore growth. AA2700 N160 N165 H1000 all burn much cooler than some other powders, and H1000 is a proven life extender in the 264 Winchester Magnum. For a guy that only hunts, and verifies zero, a barrel may outlast his lifetime. For the guy that likes to shoot steel, he wears out barrels 3x as fast as a guy that does not shoot steel. I have been shooting 7 Mags all my life, Remingtons, Browning A Bolts, BARs, and one Savage 116, various brands of custom barrels used. Most of what I have shot in the 7 Mags have been R#22 and IMR 4350 with pressures at the very top end of the load where it is the most accurate. One load with 150g-154g bullets is with R#25 with a Win mag primer is at 3240 fps with sub 10 fps ES, but barrel life with this load I figure is 600-800? rounds at the 3/8"(3 shot) accuracy I am looking for. This load with R#25 will have some major fire cracking in the barrel for 10", and I attribute that to the amount of powder used. Bug hole Loads were found quickly with IMR 4350(140g), R#22(160g), and R#25(150-154g), so I am reluctant to switch to the cooler burning powders. Brux and Krieger barrel blanks are waiting their turn. Quiet Texan's advice was spot on! I have found in my varmint rifles that Pre Fits done by a gunsmith that takes his time indicating the barrel in, and shoots amazing. I am convinced that the part of the chambering process where the barrel is indicated into the .0001 is where MUCH accuracy is attained, and I can not stress this enough. So, now I think in terms of building a "platform", which includes Stock, trigger, action, scope, and change barrels/calibers as necessary. Putting together a Platform is a LOT less expensive than having a multitude of rifles, and buying components with the money you save. These "platforms" are so incredibly accurate that when the groups open to 1/2"-5/8", I am looking for something wrong. The Key is to find that gunsmith that will indicate that the barrel in properly. Accuracy just falls in quickly with a properly indicated in barrel, especially with a caliber you are accustomed to. [/QUOTE]
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