7mm Wby Range day - part 2

boomer68

Handloader
Oct 23, 2006
862
59
Got out this morning with some different loads and still getting those darn flyers. Any ideas?

Load:

160gr TSX
RL22
71grs - 73grs
3.250" OAL
Fed 215M

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Perhaps its not that time yet, but the last one that I had that problem with, is now owned by someone else. I am much happier, I fussed with that rifle way to long. Its replacement shot sub min. groups, and was sighted in and ready to hunt in a week.
 
From a crude OBT calculation...try 70 and 70.5 grains, if its a 24" barrel.


If its 26"...back down to 67, 67.5, 68 grains...

Edit: Brain flatulence on the max load thing.
 
I wonder if dialing your seating depth back would bring your groups in. Seems like the all copper bullets may respond a little to that sorta treatment.

Your loads look good according to Alliant, so I'd probably start dialing the bullet around a bit.
 
Two in, one out indicates the need for a shorter overall length. I think that the 71 grain load will dial in.
 
I had the same issues with my standard MkV and was never able to work it out, so I sent it back to Weatherby for conversion to an Accumark. I just received the rifle back last week so I havent had time to wring it out yet, but I do have high hopes!! is your rifle a standard Mk V?
 
Not sure if this would apply, but maybe try another bullet manufacturer besides Barnes. I always had flyers with my 300 RUM shooting Barnes bullets, switched to Nosler Partitions and then onto the current AccuBond, solved the issue.

Don
 
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