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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Humbling experiance the other day. Maybe someone else can learn from this!
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<blockquote data-quote="kraky2" data-source="post: 246946" data-attributes="member: 3532"><p>I had an experience once with my 30-378. I was also shooting 200 ab's with max loads. Everything was going fine with probably 20 rounds down the barrel. It was winter and I was letting the barrel cool. I could shoot 2-3 shots and then let it sit.</p><p>Anyhow all of a sudden the chrono showed a quick gain of about 40 fps and an ejector mark appeared. Well maybe my scale hung up a bit and I got a bit more powder in that one. The next one jumped about 80 fps and the bolt was really sticky. I stopped there and pulled the last 6 rounds down when I got home.</p><p>Only thing I can think of that might have happened is my barrel fouled out and that big long AB just didn't want to go down the tube as ez as the earlier shots.</p><p>Obviously this wasn't what happened to you but it is the kind of thing you can run into when playing with the big overbore cases. When you got so much case and velocity you should be happy to stop 50-100 fps shy of max loads but so many of us like to keep the pedal to the metal!</p><p>For me it was another lesson about valid hunting loads. We all know that sometimes we can't keep our barrel as clean in the field as at the range. Temp changes, moisture, dust....you name it can all come into play. (Like 4 straight days of Alska rain on one trip!) Finding loads at the range that run redline are kind of useless out there in the field.</p></blockquote><p></p>
[QUOTE="kraky2, post: 246946, member: 3532"] I had an experience once with my 30-378. I was also shooting 200 ab's with max loads. Everything was going fine with probably 20 rounds down the barrel. It was winter and I was letting the barrel cool. I could shoot 2-3 shots and then let it sit. Anyhow all of a sudden the chrono showed a quick gain of about 40 fps and an ejector mark appeared. Well maybe my scale hung up a bit and I got a bit more powder in that one. The next one jumped about 80 fps and the bolt was really sticky. I stopped there and pulled the last 6 rounds down when I got home. Only thing I can think of that might have happened is my barrel fouled out and that big long AB just didn't want to go down the tube as ez as the earlier shots. Obviously this wasn't what happened to you but it is the kind of thing you can run into when playing with the big overbore cases. When you got so much case and velocity you should be happy to stop 50-100 fps shy of max loads but so many of us like to keep the pedal to the metal! For me it was another lesson about valid hunting loads. We all know that sometimes we can't keep our barrel as clean in the field as at the range. Temp changes, moisture, dust....you name it can all come into play. (Like 4 straight days of Alska rain on one trip!) Finding loads at the range that run redline are kind of useless out there in the field. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Humbling experiance the other day. Maybe someone else can learn from this!
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