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Thread: New brass - questions.

  1. #1

    New brass - questions.

    Hi all. Have just been loading some rounds for my 6.5x55 and have used some brand new Lapua brass. I noticed that the primer pockets were very tight and also that I needed to use a bit more force when seating the bullets compared with my previous experience using either full or neck sized pre-fired brass.
    Is this normal with brand new brass or should I have done any particular case prep prior to loading new brass?
    Ta.

  2. #2
    i've fount the lapua 6.5 x 47 lap brass tight when new, i always open them up with a K&N expander mandrel and size them in the wilson neck sizer die before trimming and first use, makes the bullet seating tension 100% consistent.

    its more apparent with the arbour press than when using a conventional press

  3. #3
    I run a mandrel through the necks of my new brass to take any dents out. I develop a load specifically for my new brass. Once the brass is into my normal cycle of ultrasonic cleaning, full length resizing and annealing, I will develop the load again.

    Regards

    JCS

  4. #4
    I only use Remington 9 1/2 Large Rifle primers and felt that the primers took a few ounces more force to seat in my new Lapua 6.5x55 brass.

    The brass is from 2 batch numbers and both batches gave me the same feel.

    Can't comment on neck tension as I run all new cases through neck sizing before loading.
    "Nonsense! They couldn't hit an elephant at this dista.....................".

  5. #5
    Rem primers I have found in lapua brass is usually tight compared to say CCI, brass I check for chamber fit in the rifle and then either neck size or full resize depending on the chamber fit of the new brass.

  6. #6
    Thanks chaps. I am a bit worried about the increased neck tension and whether it will give pressure issues? Maybe I should pull those rounds and start again after neck sizing?

  7. #7
    Quote Originally Posted by cambsman View Post
    Thanks chaps. I am a bit worried about the increased neck tension and whether it will give pressure issues? Maybe I should pull those rounds and start again after neck sizing?
    Increased neck tension is unlikely to dangerously increase pressures unless you have a very hot load already. It will most likely change the point of impact though. Depending upon how many rounds you have loaded, you could consider treating them as a separate batch rather than pulling them. Don't make the mistake that I once did and get them mixed up. I ended up pulling a whole lot more that I care to remember.

  8. #8
    Quote Originally Posted by cambsman View Post
    Thanks chaps. I am a bit worried about the increased neck tension and whether it will give pressure issues? Maybe I should pull those rounds and start again after neck sizing?
    You're the man on the spot. Try a couple of rounds. If you're not happy, then pull the bullets and work your load up from scratch. Regards JCS

  9. #9
    2p worth

    I prep all my new brass full size primer pocket and flash hole tune up saves crushing primers if the pocket is just under size. Cut case to correct AOL etc . Then after one load to fire form it just then neck is size

  10. #10
    It may not be that the primer pockets are under size but that the primers are slightly over size. Recently I tried to load Murom primers into some PPU cases, they would fit but were a much tighter fit than normal. On other occasions I have had difficulty fitting CCI primers in Norma cases. The difference that we are talking is only microns but sufficient to cause some difficulty. The solution is just to use a different primer that fits easily.
    It's the calibre of the shooter that counts not the calibre of the rifle.

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