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bullet hardness

Discussion in 'Handloading and Reloading' started by yotesmoker, Jan 24, 2010.

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  1. yotesmoker

    yotesmoker Member

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    Looking to purchase some 357 lead gas checked heads for my marlin 357.I found some with a brinell of 5 with a gc.Is this hard enough to avoid leading the bbl?If I don't use a gc on a lead bullet how hard do I need to have it to avoid leading?
     
  2. EddieNFL

    EddieNFL member

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    Five is pretty soft. The GC will help, but I would look for a harder bullet. I use an alloy that cast at about 20-22 for GCed.

    I've never fired high velocity without GCs.

    Wheel weights are usually harder than five.
     
  3. fourdollarbill

    fourdollarbill Member

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    BHN of 5 is pretty soft and it will obdurate a lot and that can work to your advantage. I would try it if you can buy a handful at a time. The gas check is going to avoid most if not all leading.

    I shoot a Marlin 357mag levergun and my mix is 50/50 (WW/soft lead) with a smigde of solder in a 165grLSWC with gas check and it works great under full house loads. I would assume the BHN is under 8 or 9 so yours is not too far off. I never had leading in that barrel with that bullet.
     
  4. bullseye308

    bullseye308 Member

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    "brinell of 5 " should be pure lead. The GC could help, I honestly don't know. Like 4$ said, try a few and see. If you get them hard enough you won't need a gas check.
     
  5. 243winxb

    243winxb Member

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    Full power loads need bhn 15
     
  6. Robert Palermo /Penn Bullets

    Robert Palermo /Penn Bullets member

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    I have found that for rifles using full power loads the 20+ bhn sans gascheck is reliable to 1800 fps with magnum speed powders in rifles. Gas checks are no gurantee of lead free shooting especially with a 5 bhn.
     
  7. Russt

    Russt Member

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    Is it a mirco groove bbl? It's been my experiance that a .360 dia bullet is a better fit, along with a 12-15bhn. I see a lot of scrubbing in your future with a 5 bhn even with a gc.
     
  8. snuffy

    snuffy Member

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    As stated, a BHN of 5 is pure lead. Why anyone would even cast a pure lead bullet is beyond me. The gas check would help, but it isn't the answer to stop leading. I've seen swaged lead bullets with a gas check. Are these almost black with a waxy feel to them? If so, you'll spend about 10 hours and a bunch of barrel wear getting the leading out of your barrel!

    A BHN of 12, and a GC,(gas check), would be much better. Wheel weights,(WW), are right around 12-14, so made of that metal and a GC, would get you where you're going. Assuming you have the bullet sized correctly AND are using a good bullet lube.
     
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