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Barrel Life

 
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  #8  
Old 02-25-2004, 08:12 PM
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Re: Barrel Life

My numbers were based on a very basic, rule of thumb type formula. Kindof a greenhill gas gauge.
No match for technology or experience.

Play with it: http://www.angelfire.com/id/psycho/images/Barrelife.xls
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  #9  
Old 02-25-2004, 11:18 PM
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Re: Barrel Life

what does bore capacity gr mean?
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  #10  
Old 02-25-2004, 11:24 PM
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Re: Barrel Life

would coated bullets help barrel life in any way? Namely the Barnes XLCs
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  #11  
Old 02-26-2004, 11:08 AM
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Re: Barrel Life

Bore capacity in grains is a observed 'grains loaded' capacity where you would get excellent barrel life for a given caliber. For instance, 47.4gr loaded and burned in a .308 bore should offer a potential of ~3500 max accurate life. The standard for this is the 6PPC. It is a preset value, and does not go into firing rate, use of moly, chrome linnings, pressure, powder type, amount pushed down the barrel-vs-burnt in the case, neck length/shoulder angle/flame point, etc. Things that are less than tangeble. That would be a helluva program!
Also, don't confuse this with "bore-overbore", or in expansion factor calcs. Thats completely different.

I doubt that the Barnes coating amounts to anything other than friction/fouling reduction. Needed due to being a solid. Moly on the otherhand, actually flashes, drawing heat from the process, and potentially improving barrel life. This will probably be introduced in upcoming reloading powders. But I won't use it unless they can keep it from coating to my bore.

[ 02-26-2004: Message edited by: Mikecr ]
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  #12  
Old 02-27-2004, 12:01 AM
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Re: Barrel Life

according to barnes little bar charts xlc's reduce pressure much more than moly. Pressure creates heat so in theory xlc would have the edge over moly in this category?

(bar charts are in XLC section of 04 catalog)
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