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Mossberg 800A load

 
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  #1  
Old 01-27-2009, 10:14 PM
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Join Date: Oct 2008
Location: Bryan, Tx
Posts: 284
Mossberg 800A load

I am reloading for an older '66 Mossberg 800a .308 WIN. My lands start at 2.954 with this particular bullet. However, the chamber will not allow anything longer than a 2.75 (0.05 shorter than the recommended 2.80 max overall length for 308WIN). That is a 2 tenths "jump" to the lands and longer jump than I have ever had to leave. Is this throat erosion, or were these rifle built to handle larger jumps? Factory ammo measures 2.69 and clears easily. It is still a heck of a hunting gun and patterns well considering the heavy trigger.
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Old 05-27-2009, 11:14 PM
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Join Date: May 2009
Posts: 6
Re: Mossberg 800A load

i use the same gun with hornady 165gr sp,

i sit back .15 off the lands

my most accurate load on imr-4895 is 40.3gr

using cci 200 primers
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  #3  
Old 05-27-2009, 11:23 PM
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Join Date: May 2009
Posts: 6
Re: Mossberg 800A load

ok so my smith said that the gun was built to the max spec to accept any ammo. the best thing to reduce chamber shock is to neck size and not trim length but it is ok to have a .20 jump but be cautious about jamming as it can increase chamber pressure outside of acceptable limits.
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