Chambering 6PPC Take-Off to 6BR

R

RAG2

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In my short Benchrest "career" I acquired two Krieger 6PPC barrels, but I haven't been able to shoot the 6PPC in 7 years and I mostly varmint shoot now, so I wanted to chamber one of them to 6BR. My current 6BR is still pump'n 1s and 2s with regularity, but at 6500 rounds it can't have too much longer. Getting to the point, using my Stoney Point bullet comparater, the length of a bullet touching the lands from the ogive to the base of the case is approximately .015" longer on the PPC than the zero freebore 6BR (my own reamer). So, for the sake of saving pennys, would it generally be okay so simply rechamber without cutting off a couple threads? Obviously, the barrel wouldn't end up with a new throat, but the barrel I would rechamber only has 300 rounds anyways...so I'm just wondering if that would potentially create anything funky in the chamber...the fact that a new throat wouldn't be cut?

Alternatively, I could find a 6BR reamer with a little free-bore, but then I'd likely need new dies, in which case I might as well just pay for a "full" rechamber job.

Thanks!
 
That should work fine as long as your gunsmith indicates the on the throat of the old chamber and use a good fitting floating pilot reamer...you would NOT need new reloading dies to load for a 6BR with a longer throat/lead...just adjust your seater out to allow the bullet to reach the lands if needed....
 
That's what I thought/hoped. Assuming my measurements were accurate, it would essentially be as if my 6BR reamer (zero free bore) has about .015" of free-bore, right? I was just trying to picture the dynamics of having the 6BR chamber replace the PPC...the 6BR is bigger in ever dimension (including a .271 neck verses a .263), excepts for the lead/free-bore. Sounds like I should be good-to-go. Thanks!
 
I'd suggest just setting it back enough to clean up the PPC throat. It doesn't take much effort to set it back a thread or two and shorten the cone to match then rechamber than it does to just run the BR reamer in to headspace. You may as well get the new throat that will match your reamer rather than have a left over throat from the previous chambering.
 
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