What length for 308

Discussion in 'Ammunition & Reloading' started by Wouva1, Jun 14, 2013.

  1. Wouva1

    Wouva1 New Member

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    G'day fellas
    After purchasing my new Howa 308 I have decided to involve myself in reloading.....I have purchased both Lyman 49th edition as well as Richard lee reloading manuals and have read both of them in side out several times over....I am confused as to the COL beetween one manuals suggestion and the other....Lyman suggest 2.005 case length and Richard lee's book suggests 2.015,I'll be using powder AR2208 and 168gr sierra match kings with 44.0gr powder,I'll be also using once fired federal brass with Redding dies,I think I no why Lyman would suggest 2.005..maybe it's so it will fit all chambers I don't no for sure.....could one of you pros please explain this theory to me as again I'm a bit confused........cheers
     
  2. ShagNasty1001

    ShagNasty1001 New Member

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    I reload for .308 and use 2.015" as OAL and they worked in my Semi Auto Saiga and my buddy's Sig 716 and that's out of a Speer reloading book that came with my reload set
     

  3. Wouva1

    Wouva1 New Member

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    Thanks mate

    Why would one book be different to the other,shouldn't they be all the same...like I said I'm just a novice and curious as to why....cheers
     
  4. ShagNasty1001

    ShagNasty1001 New Member

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    You got me on that one. I'm still fairly new to it as well
     
  5. Wouva1

    Wouva1 New Member

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    I just pulled out two boxes of factory ammo out of the safe and measured the case length with my calipers....both federal 150gr soft point and Highland 150gr soft points measured in at 2.005....starting to make me think what's right and what's wrong when it comes to reloading manuals....I guess I'll have to wait for more answers to come in....cheers
     
  6. ShagNasty1001

    ShagNasty1001 New Member

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    It may have to do with the bullet weight too. I know heavier bullets are a tad longer and I only load 165+ grain so I'm not sure what a 150 would be for me
     
  7. Wouva1

    Wouva1 New Member

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    I think we both need the answer to this question as to what is considered to be the best case trim length for 308 or better still wait and see what the pros have to say.....cheers:cool:
     
  8. mseric

    mseric New Member

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    They are not different.

    The Max case length for the 308 Win is 2.015 inches. Lyman shows this in the cartridge drawing at the beginning of the 308 Data.

    Lyman also list the "Trim-to-Length" of 2.005 inches. That is the Min you should trim your brass to. Most all bottle necked rifle cartridges have a "Trim-to-Length" that is .010 less than their SAAMI Max.

    You do not have to trim your brass to 2.005 every time you size it and load it as long as it is under 2.015. Your brass can be anywhere between 2.015 and 2.005.

    For best accuracy it's best to have them all the same length, but not a requirement.

    BTW, COL stands for Cartridge Overall Length and is used to describe a completed round with bullet. When referring to an empty case it is simply called "Case Length".
     
    Last edited: Jun 14, 2013
  9. Wouva1

    Wouva1 New Member

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    That just about clarifys and sums up everything I needed to no...once again thanks very much for all the info,it's great to learn from people who have been there and done that......cheers
     
  10. BlueTurf

    BlueTurf New Member

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    All of my .308 brass is trimmed to 2.015 and loaded with an OAL of 2.80. I shoot the loads I make in both my NM M1A and Savage bolt-action rifle with very good results.
     
  11. Wouva1

    Wouva1 New Member

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    I have done a lot of reading in regards to meeting OAL and today was reading something that totally made sense to me and I'm sure to a lot of other reloaders.....what I read was that if you create a dummy made round to meet the lands of your rifle that it will give you the precise over all length of the bullet your wishing to seat.....you get the case in the caliber you wish to reload,in my case being 308 and full length size it using your die,trim to length if desired and then use a dremel tool to cut thin slits in the case neck,once you have done that pick the desired bullet and gently seat it by hand into the neck,once you've done that chamber the round into your rifle this in turn will find the lands and create precise OAL....gently open the bolt and there you will have your dummy round made up.......I'm definitely no expert when it comes to reloading and am learning new things every day,so if I sound rediculous in what I mentioned please correct me if I'm wrong......like I said I'm a novice and trying to learn from the pros.......cheers
     
  12. mseric

    mseric New Member

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    That's one way to do it. Here is another.
    http://www.thefirearmsforum.com/showthread.php?t=97328&highlight=coal

    What you are doing is finding the Max OAL for that particular bullet. This technique is of course "Bullet" specific and must be repeated any time you change bullets.

    This is Max OAL with the bullet touching the lands. IMO you do not want to load this long. Touching the lands will cause an increase in pressure. As Nosler states in the above link, reduce Max OAL by .015-.030 to start.

    Remember the longer your OAL the Higher the pressure, so if you are starting out at say .030 off the lands, increasing OAL to .015 off the lands will also increase pressure. It's better to start long and go short then to start short and go longer.
     
    Last edited: Jun 17, 2013