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Lead Lapping the bore

Discussion in 'Handloading and Reloading' started by Afy, Mar 21, 2010.

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  1. Afy

    Afy Member

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    I want to lead lap the bore of my 8mm Mauser. Pretty much smooth it out a little.
    I have bought 50 165 grain lead, gas checked bullets. So what would be the best... shoot them as fast a velocity and speed (rate of fire) as possible? Or what would be the best way to achieve a nice lapped bore.
     
  2. Scrapperz

    Scrapperz Member

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    I found this PDF about Lapping Bores >>>>>http://www.twincityrodandgun.com/PDF%20files/Rifle%20Bore%20Lapping.pdf

    Also may see >>>http://findarticles.com/p/articles/mi_m0BQY/is_8_47/ai_76558930/
    I have never had to lap a bore to get accuracy but I know the guns I have are already lapped and it must help accuracy to an extent. I also have seen Midway USA has lapping bullets in different calibers and grit.
    http://www.midwayusa.com/viewproduct/?productnumber=646612
     
    Last edited: Mar 21, 2010
  3. Afy

    Afy Member

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    Just realised I have asked this question before. :( And still havent ordered the lapping compoung from Midway. :(:(
     
  4. Scrapperz

    Scrapperz Member

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    I'm sorry.....that's funny LOL. Good luck with it :)
     
  5. Afy

    Afy Member

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    Have just been too busy working. Will be shooting for the first time this year, coming Saturday. Just planning to go plinking with the Vz's (24 and 58)
     
  6. Scrapperz

    Scrapperz Member

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    I know what ya mean I don't get out to shoot that often either, but someday that will change for the better.
     
  7. MifflinKid

    MifflinKid Member

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    I've not fire lapped a rifle but I have done several handguns.

    I STRONGLY suggest you buy one of the commercially available kits. You can get kits that have complete ammunition ready to fire. I use the one from NECO so that I can assemble lapping ammo for various calibers.

    You want to use a light charge of fast powder. Just make sure the charge is going to get the bullets out of the barrel. Always shoot into paper so you can verify each bullet clears the barrel. Very important.

    Also, you should use soft to medium cast bullets. That will keep the surface of the bullet, with the lapping compound, in full contact with the barrel. Hard cast bullets will squeeze down going through any tight spots and may not expand back to full diameter after going past the choked area. Plus, it is easier to embed the lapping compound into a softer bullet.

    I'm not sure about using gas checks. I think the gas checks would not help in any way.

    I've found fire lapping helped several of my big bore handguns by eliminating their frame chokes. Accuracy increased measurably and the barrels are much easier to clean.

    Good luck.
     
  8. Fatelvis

    Fatelvis Member

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