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Bulseyetom
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Dual diameter grease groove bullet question
Aug 8th, 2020 at 11:31pm
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If the bore diameter of a barrel is 0.369, what diameter would you specify the front bore riding section for use with smokeless powder and 20:1 alloy?  Looking at a straight bore riding length of about 0.300 long from the end of the taper to the start of the ogive.  The rifle is a rolling block so not much camming action to seat the loaded case.  The rear of the bullet must be no larger than 0.379 to chamber without neck turning.  Thanks.  Tom
  
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ratseye
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Re: Dual diameter grease groove bullet question
Reply #1 - Aug 9th, 2020 at 4:28pm
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I have been using bore riding bullets with good results lately and I usually spec the riding section at plus one or two thousandths over bore diameter. I can push them home with my fingers. ratseye
  
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Bulseyetom
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Re: Dual diameter grease groove bullet question
Reply #2 - Aug 9th, 2020 at 5:05pm
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Thanks Ratseye!
  
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SSShooter
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Re: Dual diameter grease groove bullet question
Reply #3 - Aug 10th, 2020 at 8:41am
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ratseye wrote on Aug 9th, 2020 at 4:28pm:
I have been using bore riding bullets with good results lately and I usually spec the riding section at plus one or two thousandths over bore diameter. I can push them home with my fingers. ratseye

+1
  
Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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Dusty Rhodes
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Re: Dual diameter grease groove bullet question
Reply #4 - Aug 11th, 2020 at 9:56pm
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ratseye wrote on Aug 9th, 2020 at 4:28pm:
I have been using bore riding bullets with good results lately and I usually spec the riding section at plus one or two thousandths over bore diameter. I can push them home with my fingers. ratseye



Yep, just over is good. Remembering if they get it wrong, it's hard to size the front half of a bullet. 
  
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westerner
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Re: Dual diameter grease groove bullet question
Reply #5 - Aug 11th, 2020 at 10:24pm
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Bore diameter
  
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Longdistance1
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Re: Dual diameter grease groove bullet question
Reply #6 - Aug 11th, 2020 at 11:30pm
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Bore diameter !!!
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