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Barrels and Bullets
Aug 29th, 2021 at 10:23am
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I started down this road a little over 2 years ago and have been pleased with my progress so far. I have (5) different single shot rifles all chambered in 45-70. Overall my performance has improved so now I want to better understand the idea of matching bullets to the barrel. To that end I slugged the barrels of all (5) rifles and recorded the results ( see pic below).

In addition I listed the cast lead bullets I have been using for reloading to this point. What I am looking for is feedback re whether or not the bullets are too small or too big for specific rifles or are they just right. Any other relevant comments or feedback would be appreciated. Also any comments or recommendation for reading materials, videos or articles related to paper patching would be appreciated.

With the exception of the Trapdoor all of these guns will currently shoot a 3" to 5" group (iron sights) at 100 yards.

TIA
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rgchristensen
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Re: Barrels and Bullets
Reply #1 - Aug 29th, 2021 at 11:28am
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sent you a PM
CHRIS
  
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gnoahhh
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Re: Barrels and Bullets
Reply #2 - Aug 30th, 2021 at 7:26pm
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I would be way more interested in what my throat diameter is over my groove&bore dimensions.
  
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JLouis
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Re: Barrels and Bullets
Reply #3 - Aug 30th, 2021 at 7:42pm
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" I would be way more interested in what my throat diameter is over my groove&bore dimensions. "

I too would totally agree!
  
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Re: Barrels and Bullets
Reply #4 - Aug 30th, 2021 at 7:55pm
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" I want to better understand the idea of matching bullets to the barrel. "

To me is just exactly the wrong approach. One should pick the bullet he chooses to use and to then have a custom chambering reamer ground to specifically fit it. More times than not one has to try and find a bullet that might fit after the fact. It is just the opposite approach of how to go about doing it right based on my own experiences to date. 
But it also does help all of the mould makers stay in business so it may not be a bad thing. That is if one can afford to keep on buying moulds until he can hopefully find one that might just actually work.
« Last Edit: Aug 30th, 2021 at 8:01pm by JLouis »  
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Re: Barrels and Bullets
Reply #5 - Aug 31st, 2021 at 1:53pm
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gnoahhh wrote on Aug 30th, 2021 at 7:26pm:
I would be way more interested in what my throat diameter is over my groove&bore dimensions.


Thanks, this is also on my list of things to do - I am trying to source some Cerrosafe to make 'throat' castings of all my rifles but having a hard time finding it here in Canada.

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Re: Barrels and Bullets
Reply #6 - Aug 31st, 2021 at 1:55pm
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JLouis wrote on Aug 30th, 2021 at 7:55pm:
" I want to better understand the idea of matching bullets to the barrel. "

To me is just exactly the wrong approach. One should pick the bullet he chooses to use and to then have a custom chambering reamer ground to specifically fit it. More times than not one has to try and find a bullet that might fit after the fact. It is just the opposite approach of how to go about doing it right based on my own experiences to date. 
But it also does help all of the mould makers stay in business so it may not be a bad thing. That is if one can afford to keep on buying moulds until he can hopefully find one that might just actually work.


Thanks JL, that's food for thought.

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oneatatime
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Re: Barrels and Bullets
Reply #7 - Aug 31st, 2021 at 3:02pm
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Here you go, Retreever: (You need to Login or Register to view media files and links)
  
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Re: Barrels and Bullets
Reply #8 - Aug 31st, 2021 at 5:24pm
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Matching a bullet to a barrel is much cheaper and easier than matching a barrel to a bullet. 

Only when using fixed ammunition are neck /chamber dimensions important.
  
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Re: Barrels and Bullets
Reply #9 - Aug 31st, 2021 at 6:02pm
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Try RotoMetals their price is about half of what Brownells wants and they also have the time related shrinkage rates on their site.


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Re: Barrels and Bullets
Reply #10 - Sep 1st, 2021 at 11:52am
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oneatatime wrote on Aug 31st, 2021 at 3:02pm:
Here you go, Retreever: (You need to Login or Register to view media files and links)


Thanks OTT, but it is shipping from the states, I actually found a source here in Canada.

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Re: Barrels and Bullets
Reply #11 - Sep 1st, 2021 at 11:53am
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JLouis wrote on Aug 31st, 2021 at 6:02pm:
Try RotoMetals their price is about half of what Brownells wants and they also have the time related shrinkage rates on their site.


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Thanks JL but I did find  source here in Canada.

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