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.357 C.O.A.L

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Twotone
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.357 C.O.A.L

Post by Twotone » Fri Sep 08, 2017 6:28 am

Hi all,
This may be a stupid question but I am relatively new to all this. I developed a successful load for my Henry BBB which took a lot of time and different powders etc using once fired factory brass. I trimmed the cases to 1.285" and maintained a COAL of 1.585". Then I decided to order some new brass, the Starline is average 1.275 and the PPU even less. What do I do now? If I try to maintain my COAL the bullet will be seated further out reducing pressure or the other way I get a smaller COAL and have the opposite. Either way the load I have been using is seemingly redundant. I am curious, why is new brass so far below the Saami spec and should I now start all over ?
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clovishound
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Re: .357 C.O.A.L

Post by clovishound » Sat Sep 16, 2017 12:29 pm

What powder are you loading? I normally load target fodder. I use medium speed powder like Universal. This doesn't come even close to maximum volume, plus I am loading in the middle of the range, so I don't worry about COAL. I just crimp in the canelure and call it good.

I ran up some loads using H4227 a few years ago. I ran out of room in the case long before I reached max powder weight.
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Twotone
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Re: .357 C.O.A.L

Post by Twotone » Sat Sep 16, 2017 3:25 pm

Hi
I am using Lil gun at the moment. I cannot say I have noticed any obvious signs of anything untoward but I am just curious as to why the brass is so undrsized compared to factory brass which I used to start with.
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Squatch
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Re: .357 C.O.A.L

Post by Squatch » Sat Sep 16, 2017 11:38 pm

That's really not a huge difference and some cases grow the 1st couple of times they are shot.

The more brands of "factory" brass you use the more differences you'll find.

That's why i have a case trimmer and check all my cases to that. Some brands come up ever so slightly shy. Never found it to be a big deal. I too crimp to the canelure. My COAL varies with different bullet's.
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