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Posted: 9/6/2010 2:32:59 PM EDT
| Your instincts may be leading you in the right direction. Sooty cases are often a sign of a light load that doesn't adequately expand the cartridge to make a tight seal within the chamber, thus allowing some blowback. However, the data you give seems like it should be within specs. You're well within the window of your load range to take it up a bit to see if it helps. |
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i had a few rounds do this with the first few batches i loaded (ever) and was wondering, i attributed this to the first powder drop from the measure not being a full drop. from now on i work the dropper a few cycles with a case underneath it to catch the powder to make sure im getting full drops. one of them was so light it got a bullet stuck halfway down the barrel |
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Be sure your powder measure is throwing the correct charge, before you start loading.
For me I weigh the first 10 or 15 throws before before going progressive. What I mean is when the powder has dropped and case is in the bullet seating station, I take the case out and weight the powder charge. Return powder to case, put case back in seating station. Then seat bullet. Next charged case at the seating station gets it's powder charge weighed. Repeat and adjust as necessary. |
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Quoted:
Be sure your powder measure is throwing the correct charge, before you start loading. For me I weigh the first 10 or 15 throws before before going progressive. What I mean is when the powder has dropped and case is in the bullet seating station, I take the case out and weight the powder charge. Return powder to case, put case back in seating station. Then seat bullet. Next charged case at the seating station gets it's powder charge weighed. Repeat and adjust as necessary. Thanks everyone for the answers. I'll add in a few grains and see where it goes. What would you say an okay tolerance would be on a progressive? my loads are usually +/- .1gr. Is that okay? Meaning, my 5.0 gr of Titegroup are always between 4.9 and 5.1, but majority of the loads I measure (I also measure the first 10-15) are right on at 5.0 gr. I've chalked it up to a few grains sticking here and there in the powder drop, a few sticking in the expander and a few sticking in my powder checker. I'm not sure what I can do to keep them from sticking. I've tried cleaning them but it still happens. |
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Your - .1 grain / + .1 grain variation is normal with a mechanical powder charger. That variation should be ignored considering what you are loading & its pressure range.
Some chargers are not that consistent & throw larger weight variations. If you were loading very high pressure, MAX rifle load with very flattened primers & a few pierced primers, that variation should be of great concern. And you would reduce the charge accordingly. And you would pull the over charged loads rather that shoot them for obvious safety concerns. But, that is not your situation. You could try wiping the powder charger with a used anti-static drier sheer, if you think powder is actually sticking to plastic or metal parts. |
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Quoted:
Thanks everyone for the answers. I'll add in a few grains and see where it goes. What would you say an okay tolerance would be on a progressive? my loads are usually +/- .1gr. Is that okay? Meaning, my 5.0 gr of Titegroup are always between 4.9 and 5.1, but majority of the loads I measure (I also measure the first 10-15) are right on at 5.0 gr. I've chalked it up to a few grains sticking here and there in the powder drop, a few sticking in the expander and a few sticking in my powder checker. I'm not sure what I can do to keep them from sticking. I've tried cleaning them but it still happens. Mechanical powder measures operate on volume, not weight. Minor variations are expected, and a two tenths total variance isn't bad at all. |
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Quoted:
Good to know. I think I'll take it up to 5.4 gr and see how that functions. Whoa.... you've gone from checking that horse at a walk to slipping the reigns to all out gallup..... Depending on bullet type and OAL. 5 grains of titegroup is my plinker load and 5.2grains being the high. Suggest you shoot a few at 5, then 5.2. through a chrono. My 5.2 grain titegtoup, 200 grain load chronos at 950+ fps. |
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Those look like they came out of a Glock. You can try working up the load but they will still have some scorching on one side of the case. All of mine do that.
The 1911 guys get all uptight when they see it. But it keeps them from picking up my brass when I shoot. |
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