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Old January 27, 2012, 05:40 AM   #12
HiBC
Senior Member
 
Join Date: November 13, 2006
Posts: 8,274
I do not know if Weatherby still practices it,but in years past part of the Weatherby design was a substantial amount of "freebore",which,IIRC,would be removing the rifling for about the first inch plus of bore.f your Weatherby has freebore,it will be even harder to get the pressure needed to obturate the case.

I agree stepping a little quicker on the powder might be an idea.H-4831 is a bit quicker and may be worth trying.

Likely its not going to work so well to stay down in the starting load range.You may need to push things closer to max,with all due caution.

Please be aware that with a very high capacity case with a very small bore to let the pressure diminish,pressures can jump from moderate to too high rather quickly.Change one thing at a time and sneak up on it,but it may take a near maxload to work well.

While sometimes the mfgr's tech help is a bit guarded,sometimes making a phone call to Nosler or Hogdon or whatever mfgr you are buying components from will help.
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