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Rifles, Reloading, Optics, Equipment
Reloading
Quickload help 7mm-08
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<blockquote data-quote="ClaynTexas" data-source="post: 1095836" data-attributes="member: 90987"><p>Ok...</p><p>It looks like the first round of the ladder loads was all for naught. I was having trouble finding 7mm-08 brass and had picked a box of Lapua .308 (it was a steal at $59!) and necked them down. After loading, they all had consistent neck diameters of .314"-.315". Some of you see the answer already coming, don't you!</p><p></p><p>Since .315" is SAAMI max cartridge and .316" is SAAMI chamber minimum, I thought it would be fine. I dropped 1 loaded round in the chamber and made sure it would in fact chamber. It did.</p><p></p><p></p><p>Anyway, every load had flattened primers. Even the minimum loads. This made me think I had bumped the shoulder a bit too far when I loaded them, resulting in a bit excessive headspace. So I stripped the rifle and took the firing pin and ejector out of the bolt to try to see about this headspace issue. </p><p></p><p>I first tried one of the fired Lapua cases. It was a bit hard to get the bolt locked and definitely hard to get it unlocked. Next I tried one of the 10 cases I had left that were sized and primed, but haven't been loaded and are unfired. Same thing, hard to lock and unlock.</p><p></p><p>Next I removed the BCG and fed the same empty, sized but unfired case and and gave it a tap. I held the upper barrel upward and it didn't fall out. I gave it a smack and it still didn't fall out.</p><p></p><p>Next I put a once-fired and sized Hornady 7mm-08 case in and turned the upper barrel up. It fell right out. lightbulb </p><p>I also tried a new unfired empty PPU case as well as a factory loaded Hornady and factory loaded Remington. Both dropped right in and fell right out when flipped.</p><p></p><p>Next I chambered each of them with the BCG (firing pin removed) in place to see how hard/easy it would be to turn and lock the bolt. It was very easy with all except the Lapua .308 cases.</p><p></p><p>Long story short...It looks like my chamber neck is on the tight side and won't tolerate a necked down .308 without neck turning. I think this was causing excessive pressure and cycling issues across the board. So...it's time to try it all over again, but with native 7mm-08 cases.</p></blockquote><p></p>
[QUOTE="ClaynTexas, post: 1095836, member: 90987"] Ok... It looks like the first round of the ladder loads was all for naught. I was having trouble finding 7mm-08 brass and had picked a box of Lapua .308 (it was a steal at $59!) and necked them down. After loading, they all had consistent neck diameters of .314"-.315". Some of you see the answer already coming, don't you! Since .315" is SAAMI max cartridge and .316" is SAAMI chamber minimum, I thought it would be fine. I dropped 1 loaded round in the chamber and made sure it would in fact chamber. It did. Anyway, every load had flattened primers. Even the minimum loads. This made me think I had bumped the shoulder a bit too far when I loaded them, resulting in a bit excessive headspace. So I stripped the rifle and took the firing pin and ejector out of the bolt to try to see about this headspace issue. I first tried one of the fired Lapua cases. It was a bit hard to get the bolt locked and definitely hard to get it unlocked. Next I tried one of the 10 cases I had left that were sized and primed, but haven't been loaded and are unfired. Same thing, hard to lock and unlock. Next I removed the BCG and fed the same empty, sized but unfired case and and gave it a tap. I held the upper barrel upward and it didn't fall out. I gave it a smack and it still didn't fall out. Next I put a once-fired and sized Hornady 7mm-08 case in and turned the upper barrel up. It fell right out. lightbulb I also tried a new unfired empty PPU case as well as a factory loaded Hornady and factory loaded Remington. Both dropped right in and fell right out when flipped. Next I chambered each of them with the BCG (firing pin removed) in place to see how hard/easy it would be to turn and lock the bolt. It was very easy with all except the Lapua .308 cases. Long story short...It looks like my chamber neck is on the tight side and won't tolerate a necked down .308 without neck turning. I think this was causing excessive pressure and cycling issues across the board. So...it's time to try it all over again, but with native 7mm-08 cases. [/QUOTE]
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Quickload help 7mm-08
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