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Normal Topic throat erosion? (Read 2710 times)
rgchristensen
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throat erosion?
May 15th, 2015 at 2:16pm
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    I am noticing that the bullets are having to be loaded a little longer to touch the leade in my 40-65 Brownchester.   The front band of the bullet used to be nearly covered, now is nearly uncovered.   I'm guessing 0.040" or a little more difference.    I use it for silhouette and MR, and occasionally at local fun shoots, certainly less than 1000 rd/year.   So in 14 years, it has probably 10,000 rd thru it.   
    The only thing I can think of is throat erosion.   Anyone else have experience of this?

CHRIS
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tim_s
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Re: throat erosion?
Reply #1 - May 15th, 2015 at 5:19pm
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Throats erode, some more than others. Fact of life with several calibers/loadings.
  
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texasmac
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Re: throat erosion?
Reply #2 - May 16th, 2015 at 1:49am
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rgchristensen wrote on May 15th, 2015 at 2:16pm:
    I am noticing that the bullets are having to be loaded a little longer to touch the leade in my 40-65 Brownchester.   The front band of the bullet used to be nearly covered, now is nearly uncovered.   I'm guessing 0.040" or a little more difference.    I use it for silhouette and MR, and occasionally at local fun shoots, certainly less than 1000 rd/year.   So in 14 years, it has probably 10,000 rd thru it.   
    The only thing I can think of is throat erosion.   Anyone else have experience of this?

CHRIS
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Chris,

You're the 1st shooter that has suggested throat erosion in a Browning BPCR that I'm aware of.  Have you changed bullets or possibly the alloy which will result in slight bullet diameter changes?  Are you shooting black or smokeless?  I've shot thousands of BP round thru my Browning .40-65 with velocities at 1340 fps and have not noticed any changes.

Wayne
  
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win 32-40
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Re: throat erosion?
Reply #3 - May 16th, 2015 at 12:19pm
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At 10000 rounds you will get erosion in any cal. but with your 40-65 , you are getting MUCH less than you would with a smaller bore , high vel cal
  
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MartiniBelgian
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Re: throat erosion?
Reply #4 - May 16th, 2015 at 1:36pm
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My experience too, shooting a no.2 Musket match rifle - I can seat the bullet further out now than in the beginning.  Didn't keep vount of the no. of shots, though.
  
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