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Normal Topic Using the correct bullet. (Read 78 times)
Babydriver
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Using the correct bullet.
Today at 3:13pm
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Recently I got a low wall in 32-20. I slugged the bore and it measure around .308-309. Some slight variations as I go around the slug. Of course this is the lands. So what would be the correct size bullet to use? Probably?
  
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bpjack
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Re: Using the correct bullet.
Reply #1 - Today at 3:32pm
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This is what I use.

Manufacturer      Number      Weight      Length          Base Band
Accurate             145M            144.00        .7930               .3100
Lyman             311008            116.20         .6400               .3150
  
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frnkeore
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Re: Using the correct bullet.
Reply #2 - Today at 4:05pm
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I would go with the Lyman 311410. It was made for a 20 twist 30 cal barrel.

It's 130 gr and has a better nose shape and  BC.
  
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YIMAIM  
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Dellet
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Re: Using the correct bullet.
Reply #3 - Today at 5:07pm
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Just to clarify, the high spots on the bullet will be the grooves, the low spots will be the lands of the barrel. or the bore.

Normal for a 32-20 would be more like .305”/.311”. 
A 30 caliber would boss .300”/.308”
  
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oneatatime
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Re: Using the correct bullet.
Reply #4 - Today at 5:30pm
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Considering that the Lyman 31108 (now 311008) has been the standard bullet for the 32-20 for over 100 years, it should be a good place to start.
  
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Babydriver
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Re: Using the correct bullet.
Reply #5 - Today at 6:02pm
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I got double crossed on lands vs grooves. Wouldn’t be the first and won’t be the last.
  
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