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Home » General Conversation » Reloading » HELP!! (how does one resize 308 to 7mm 08)
HELP!! [message #26411] Tue, 10 December 2013 21:12 Go to next message
egoredayooper is currently offline  egoredayooper
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HELP...Never done this.. do I just run 308 casing thru 7mm 08 FL die? Some where to read up on how to do..

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Re: HELP!! [message #26421 is a reply to message #26411] Wed, 11 December 2013 08:42 Go to previous messageGo to next message
Crubear is currently offline  Crubear
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I'm assuming your going to 7-08 Wink

Yes, resize and trim to length. If you're using military brass work the load up, case dimensions in military brass can be thicker. Also, after you fire a round try dropping a bullet into the fired case. If it doesn't drop down into the case "STOP SHOOTING". There isn't enough room in your chamber for the brass to expand and release the bullet and you'll need to do some neck turning. (If you neck turn and the bullet drops to the shoulder then you have donuts, but it's OK to keep shooting)

Honestly, I have all the barrels I want or could ever need..... wait, look, there's another!!

[Updated on: Wed, 11 December 2013 08:45]

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Re: HELP!! [message #26431 is a reply to message #26421] Wed, 11 December 2013 14:02 Go to previous messageGo to next message
egoredayooper is currently offline  egoredayooper
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Do you mean neck turning as boring out the inside of the neck, how does one do this?

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Re: HELP!! [message #26432 is a reply to message #26431] Wed, 11 December 2013 15:02 Go to previous messageGo to next message
Crubear is currently offline  Crubear
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There are two ways to do this, as you state with a neck reamer or from the outside with a neck turner. This will help more than I ever could: http://www.redding-reloading.com/tech-line-a-tips-faqs/147-a dvanced-case-forming-operations-

My preferred tool is the K&M (Yes, a shameless plug)
http://www.kmshooting.com/

Honestly, I have all the barrels I want or could ever need..... wait, look, there's another!!

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Re: HELP!! [message #26444 is a reply to message #26432] Wed, 11 December 2013 19:46 Go to previous messageGo to next message
egoredayooper is currently offline  egoredayooper
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This looks like a little advanced for me..think I will hold off on this for a while..Thanks for the info

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Re: HELP!! [message #26470 is a reply to message #26444] Thu, 12 December 2013 09:29 Go to previous messageGo to next message
lepcur is currently offline  lepcur
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You'll probably be better off just to find some 7mm-08 brass, a lot easier. Mike

[Updated on: Thu, 12 December 2013 09:35]

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Re: HELP!! [message #26473 is a reply to message #26470] Thu, 12 December 2013 09:46 Go to previous messageGo to next message
rchatting is currently offline  rchatting
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I was going to use winchester 308 brass for 7mm-08. I resized and then loaded the rounds. I decided to measure the outside diameter of the loaded round at the neck and found that it was the same dimension as the SAAMI chamber minimum. I then measured some once fired from that gun and found that the chamber minimum was the same dimension as the loaded round. I had read that you should have .020?? difference for the neck to be able to safely release the bullet, but they were virtually identical. I then chambered a round and found it was quite tight going in. This made me a bit nervous, so I pulled all of them. The loaded rounds with factory 7mm-08 are smaller around the neck loaded.

The conclusion, if I wanted to use .308 brass, I would need to outside neck turn the brass to get within spec for safety. I bought some 7mm-08 brass instead. I may one day buy an outside neck turner, but decided to defer to a later date. Now, had my chamber had more room to work with, I would have used the .308 brass.

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Re: HELP!! [message #26477 is a reply to message #26473] Thu, 12 December 2013 11:54 Go to previous messageGo to next message
Shyoldman is currently offline  Shyoldman
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To bad, I shoot 2 different guns in 7-08 and both of them handle 308 brass fine, fit fine loaded and fired. I BOUGHT ONCE FIRED MILITARY EVEN, and still fit ok. Guess I have loose chambers, one a Ruger, one a Howa.

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Re: HELP!! [message #26480 is a reply to message #26477] Thu, 12 December 2013 12:52 Go to previous messageGo to next message
Crubear is currently offline  Crubear
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That's why you need to check - and start low to check pressure.

Honestly, I have all the barrels I want or could ever need..... wait, look, there's another!!

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Re: HELP!! [message #26484 is a reply to message #26480] Thu, 12 December 2013 18:29 Go to previous message
rchatting is currently offline  rchatting
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You mean my mossberg has a tighter chamber than a ruger. Never would have figured that.

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