I used an RCBS digital scale that has 0.1 grain of accuracy for this test.

I purchased Nosler Brass N=50 and all testing was conducted as it came from the factory without any further modification.

The statistics included mean 174.6 grains, ave. dev 0.21 with min of 174.2 and max of 175.2 and percent of ave. 0.57 which appears to be better than the statistics for brass tested by the author.

The Nosler brass is advertised as manufactured at the factory with uniform primer pockets, chamfered necks and cut to length which upon observation can be seen with the naked eye.

I then tested case volume for min, max and ave. case weights with each being very close at 52.0, 52.2 and 52.3 which means probably that for small cases weight does not necessarily translate into large volume differences say for example a 300 Winchester Magnum. I am wondering how much difference in accuracy can case weight make for smaller cases?

I also am planning to look at overall length, neck size and neck inside diameter which may tell more about accuracy.

I’m amazed(and suspicious) that the capacity spread among these cases was so low. I have not seen capacity spread so low with lots of Lapua, Norma, and Tubbs in 223, 6br, or 6xc. But have had similar results only with different lots of Win WSSM reloading cases(the best brass I’ve seen to date).
To qualify my testing is always on fully fireformed/unsized cases, which I scale stand on a plastic golf tee.

I also have Win and Lake City around somewhere.

The Remington has batches from 1980 and 2000 the PMC is all from 1980. All the brass from the 80s has been shot and annealed more than 20 times.

I don’t shoot max loads anymore, not since I first started. All cases seem to handle normal loads in a bolt action just fine. The PMC seems to work better in the AR. I rarely shoot .15″ groups but with the exception of the Frontier & PMC brass the groups are very close in average size.

Robert Whitley