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Rifles, Reloading, Optics, Equipment
Reloading
Quickload help 7mm-08
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<blockquote data-quote="ClaynTexas" data-source="post: 1104879" data-attributes="member: 90987"><p>It's been a while but....tried it all again and things worked out much better this time around. I used PPU 7mm-08 cases instead of necked down .308s. The only issue now is a bit of primer extrusion around the firing pin (cratering). It usually starts about mid-range in the loadings, but seems to be worse the faster the powder is. Interestingly, it didn't do it at all with Power Pro 2000. It seems to be tied to the burn rate of the powder and Power Pro 2000 was the slowest I tried. That aside, the primers are not flattening at all. They have nice round edges. I'm pretty darn certain it's not pressure, but an oversize firing pin hole in the bolt instead. Standard fare from AR308 style rifles as far as I can tell.</p><p></p><p>I fixed the short stroking issue. I ran about 100 rounds between handloads, Hornady Whitetail, and Rem Core-lokt. All ran flawlessly. The answer was the gas port. I took it apart and measured the gas port and it was 0.082". I opened it up to 0.093". The side effect, of course, is a bit deeper extractor marks on the cases. It might need a bit more carrier weight. If I could do it over again, I would try a #44 drill bit first and see if it was enough. Followed by a #43 if it wasn't.</p><p></p><p>I am going to give CCI #34 primers a day in court and see if that fixes the cratering issue. If not, supposedly JP Superbolt HP will fix it.</p><p></p><p>FWIW, I tried 4895, 748, H4895, 8208 xbr, 4064, RL 15, and PP2000 this time with 120 TTSX, 130 BTSP, and 162 Amax's. PP2000 gave best primer readings, H4895 gave smallest groups and worst cratering. </p><p></p><p>I will probably also try 139/140s and Varget next....just like everyone says to do. From what I've seen so far from the rifle, it will probably like those and the 162s best. It's decent with the 130s. It doesn't seem to favor the 120s, but I didn't fire many of them. Scope reticle snapped and I didn't take the spare with me.</p></blockquote><p></p>
[QUOTE="ClaynTexas, post: 1104879, member: 90987"] It's been a while but....tried it all again and things worked out much better this time around. I used PPU 7mm-08 cases instead of necked down .308s. The only issue now is a bit of primer extrusion around the firing pin (cratering). It usually starts about mid-range in the loadings, but seems to be worse the faster the powder is. Interestingly, it didn't do it at all with Power Pro 2000. It seems to be tied to the burn rate of the powder and Power Pro 2000 was the slowest I tried. That aside, the primers are not flattening at all. They have nice round edges. I'm pretty darn certain it's not pressure, but an oversize firing pin hole in the bolt instead. Standard fare from AR308 style rifles as far as I can tell. I fixed the short stroking issue. I ran about 100 rounds between handloads, Hornady Whitetail, and Rem Core-lokt. All ran flawlessly. The answer was the gas port. I took it apart and measured the gas port and it was 0.082". I opened it up to 0.093". The side effect, of course, is a bit deeper extractor marks on the cases. It might need a bit more carrier weight. If I could do it over again, I would try a #44 drill bit first and see if it was enough. Followed by a #43 if it wasn't. I am going to give CCI #34 primers a day in court and see if that fixes the cratering issue. If not, supposedly JP Superbolt HP will fix it. FWIW, I tried 4895, 748, H4895, 8208 xbr, 4064, RL 15, and PP2000 this time with 120 TTSX, 130 BTSP, and 162 Amax's. PP2000 gave best primer readings, H4895 gave smallest groups and worst cratering. I will probably also try 139/140s and Varget next....just like everyone says to do. From what I've seen so far from the rifle, it will probably like those and the 162s best. It's decent with the 130s. It doesn't seem to favor the 120s, but I didn't fire many of them. Scope reticle snapped and I didn't take the spare with me. [/QUOTE]
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Quickload help 7mm-08
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