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CDM vs Starline case capacity?

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Pantera Mike View Drop Down
Callahan's Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pantera Mike Quote  Post ReplyReply Direct Link To This Post Topic: CDM vs Starline case capacity?
    Posted: 09 Aug 2018 at 4:35pm
Thanks to all, especially Bruce. Great information here!
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Benny123 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Benny123 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2018 at 12:04am
Yeah, I didn’t know what 630 was. Not sure when that was produced. 680 I’d see a bit and was replaced by aa1680 which is a fav for keeping the pressure down on hot loads for large for caliber bullets in magnum cartridges. Presuming it shines for the 265 in the 44amp
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Benny123 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2018 at 12:00am
Nice job—all came through
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jw4570 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 11:45pm
I forgot one was with discontinued 630 powder.  296 and Blue dot still around.  3 44's and 3 357's pressure tested.

Maybe Ian can add this to his info page?
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jw4570 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 11:39pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 11:34pm
I uploaded the files but can't figure how to link them here...

It says Error inserting it in current location

And I can't access the FAQ again.

Jason
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 11:24pm
Lee Did Pressure test something like 6 loads of SuperVel.  I have the pages somewhere.  He had them up on his site when he had it.
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Benny123 View Drop Down
International Auto Mag
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Benny123 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 11:04pm
That’s a really informative article by B Stark. And I forgot about it, when I first saw the title I really didn’t understand the need to search for a moderate load and how one could use a slow-burn pistol based powder for an otherwise slow moderate load. Charges of w296/h110, and mp300 are designed to be almost at capacity. And the part that states that no pressure testing has been done with respect to the cartridge. Didn’t Lee Jurras produce his own line of ammo , Supervel, and was the first to commisison a pressure gun for this cartridge, he’s stated in the articles around a 40- 45K max pressure range, with charge details for his own line of bullets and others. I dunno maybe I’m wrong. As Ive mentioned before anything Detailed oriented about the automag I learned from this Ian site and forum .
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CrazyLarry View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote CrazyLarry Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 10:50pm
From what I have seen measured:

(lowest to highest resized 308 brass capacities)
LC-NATO
WCC-NATO
Fed-GMM
Winchester
Remington

NATO brass is nearly all identical, but, there are lot-2-lot differences anyhow.

Cut down military brass has the thickest amount of metal around the bottom, therefore it "should" last longer.


Starline brass is made "thicker" than 44mag brass at the web/primer pocket, but, not by much.

If I were going for 1300fps with a 240gr bullet, an 8.5" barrel is needed.
From what I have read else where with 308 based loads, there is not that much of a difference in capacities for pistol rounds that end up with significant changes to velocity.


Now, in a rifle, that is a different story. I used to cut down 30-06 REM brass to make 300SAV before I scored a bag of once fired REM cases at a gun show. Cut down 30-06 was 100fps consistently slower than resized original 300SAV brass.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Aug 2018 at 10:20pm
Look no further than Ian's Site for an article by Barry Duckworth and Bruce Stark.

The case capacity is actually compared using grains of WW296, but I think it's the relative capacities you are looking for:

http://www.amtguns.net/articles/bruce-stark/in-search-of-1250-fps/

Jason
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