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| Powder position and squib loads http://ellegon.com/forum/viewtopic.php?f=26&t=3778 |
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| Author: | dom [ Fri Jan 05, 2007 8:40 am ] |
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I've had the same problem with Unique in .38 Special. Powder postion does matter with this combination. The first round of a string would always be lighter. This condition is even worse shooting outside during the winter. Even though Unique has a medium burning rate, I believe it is a harder powder to get ignited, especially at mild .38 pressures. I switched to Hodgden TiteGroup for my mild .38 loads, and the squibbing totally disappeared. |
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| Author: | Dave Matheny [ Fri Jan 05, 2007 10:05 am ] |
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I really appreciate all this input, guys. This is one of the things a forum like this is so good for. Anyway, I have gone back and increased the crimp moderately on 25 of my already-loaded rounds. (Thanks, Pinnacle and others!) I'm using a visual inspection and another tactile one to ensure that there is some increase in crimp: Running a thumbnail over the crimp. I haven't been to the range yet, so we will see. |
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| Author: | Pinnacle [ Fri Jan 05, 2007 10:32 am ] |
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Dave Matheny wrote: I really appreciate all this input, guys. This is one of the things a forum like this is so good for. Anyway, I have gone back and increased the crimp moderately on 25 of my already-loaded rounds. (Thanks, Pinnacle and others!) I'm using a visual inspection and another tactile one to ensure that there is some increase in crimp: Running a thumbnail over the crimp. I haven't been to the range yet, so we will see. Thanks - BUT before we all pat ourselves on the back in triumph over solving this problem - go to the range and see of this is the problem. I have never had this problem with Unique - it is my go to powder. I love the stuff. Let me know how this works. |
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| Author: | cdl [ Mon Jan 15, 2007 1:58 am ] |
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According to my log book, I tried 3.6gr of Unique behind a 148gr HBWC in a 38sp in 1986. I didn’t note any problems, but I switched to Bullseye in 1987. I did have a squib problem once when I tried to extend the life of my corn cob with a little metal polish from under the sink. Maybe you ended up with some of that brass I threw away. |
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| Author: | Dave Matheny [ Mon Jan 15, 2007 10:00 am ] |
| Post subject: | |
Apparently the added crimp works, as do the increased loads -- 5.0 grains of Unique (maximum load in the RCBS book is 5.1). I re-crimped a box and fired about 50 rounds without incident. I think I will scale back to 4.7 grains, given the newer, somewhat tighter crimp. Also, John at Gunstop says he uses 4.4 grains and has never had a problem. |
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| Author: | Pinnacle [ Mon Jan 15, 2007 10:19 am ] |
| Post subject: | |
Dave Matheny wrote: Apparently the added crimp works, as do the increased loads -- 5.0 grains of Unique (maximum load in the RCBS book is 5.1). I re-crimped a box and fired about 50 rounds without incident. I think I will scale back to 4.7 grains, given the newer, somewhat tighter crimp. Also, John at Gunstop says he uses 4.4 grains and has never had a problem. I am thinking that it is all about start pressures and I am glad that we have solved this problem.... Sometimes it is the little stuff. |
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| Author: | Seismic Sam [ Fri Jan 19, 2007 8:11 pm ] |
| Post subject: | Powder position is a myth |
Unless you have some load that is SO marginal due to the primer power, slow powder burning speed, and bullet crimp that you're pushing the absolute outside edge of the envelope. There is absolutely NO freaking way you can get this behavior to occur if you are shooting Bullseye, 231, or PB. Never had it happen to me in 35 years or reloading with the above powders. I HAVE had it happen to me with 40 grains of Lil' Gun and a CCI 350 primer in a S&W 500. Unique is pretty reliable, but with light powder loads it's still far slower burning than Bullseye. In addition, if powder position ISN'T a myth, how can it EVER be possible to shoot a gun with consistently performing loads if the accuracy of every shot depends on how the powder is sitting in the case?? No way, Jose... |
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