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Take two of your cases put a spent primer in up side down put the case on your scale and zero it fill the case with h20 Make sure your case is full dry all the water off the case and see what the weight is. Check both and you should have a good average . LarryDoes anyone have an accurate H2O weight for the .284 Shehane using Lapua brass? I have a chamber that measures .485 at the shoulder instead of the print on QL with .475. That said, my water volume is 10.0 gr. less than the default setting on QL. Any help would be appreciated.
Thanks,
Lloyd
Larry,Take two of your cases put a spent primer in up side down put the case on your scale and zero it fill the case with h20 Make sure your case is full dry all the water off the case and see what the weight is. Check both and you should have a good average . Larry
Now do all your brass and watch your ES go down when you sort by volume. LarryLarry,
That is exactly what I did and came up with 68.5.
In my two rifles it's 68.4gn v 66.7gn, so not a large increase even allowing for variances in weighing. Both Lapua brass but different lots. My N165 load for the 284 is 57gn and that for the Shehane is 59.7gn, both 180s in the lands but different models (Sierra MK for the 284 and Scenar L for the Shehane). Both are compressed loads, both are relatively mild and the Shehane is actually slower than the straight version by around 25 fps. (Bartlein on the 284, Benchmark on the Shehane). Some Shehane brass is on its 8th loading and primer pockets are as tight as new cases.
Laurie,
You stated that the Shehane was 25 fps slower than your "straight" 284. What are the velocities that you are getting and do think it could be slow barrel or slow lot of powder.
Lloyd