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Thread: 308/303

  1. #1

    308/303

    A bud is folding up, he dont have the time any longer for the sport & has offered me his 308 bullet heads. He has various sierra heads from 125-180 gr heads. Will these be any good to reload my 303 cal ?? There is only 3 thousanth of an inch, diffrence in dia.

    http://www.sierrabullets.com/index.c...le&caliberID=9

    Thanks

  2. #2
    Quote Originally Posted by MrYou View Post
    A bud is folding up, he dont have the time any longer for the sport & has offered me his 308 bullet heads. He has various sierra heads from 125-180 gr heads. Will these be any good to reload my 303 cal ?? There is only 3 thousanth of an inch, diffrence in dia.

    http://www.sierrabullets.com/index.c...le&caliberID=9

    Thanks
    It will depend entirely upon your barrel, some will shoot the undersize .308 bullets others will not. Now if your talking about a No4 Lee Enfield the your most likely going to be wasting your time with them as durign most of the No4's production they dropped the size standards for the bore ans so it's possible to find a bore of 0.317" groove size and a bore of 0.307 or 0.309" if that's the case you have no chance. No4's tend to have larger bores than the earlier SMLE (No1).

    I have tried the Sierra and Speer .305 125 grain bulelts in a couple of 303's but accuracy was not good. You might get away with it more with longer heavier bullets but again it's a suck it and see thing.

  3. #3
    I would not bother ! Why work up a load when there are to many variables.

    Is he selling his press ?

  4. #4
    I have a pair of No4, MkII rifles that have .310" groove diameters but most (and I can tell you because I'm a cast bullet shooter and a .303 fan and have slugged many Enfield groove diameters) have .314" groove diameters. The real problem lies in the bore diameter when it comes to accuracy. I have had some well-worn Enfields that are as large as .306" from the top of one rifling land to the opposing land. There is no chance of any accuracy in these rifles using .308" bullet.

    Quick advice? Measure the key diameters of your rifle's barrel before you decide but understand that at best, you'll be getting second rate results.~Muir

  5. #5
    Thanks guys, i knew the goods were here. best

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