(04-29-2024, 11:08 PM)KMW1954 Wrote: Still learning this cartridge and it's idiosyncrasies so today I did a little investigating and an inconclusive test with these two brands of brass..So was this new unfired brass? Or once fired brass? Comparing the capacity of new brass is kind of pointless as the shoulder could be +/- .010 or more and the OAL can be =/- .005 or more. It needs to be "uniformed" to a chamber and then trimmed to the same OAL and chamfered the same to get a useful comparison between brands. Im not sure I understand your last sentence, "So with this short test it looks like the deviation between the two brands is not that great. Being only 0.3gr difference. With the Starline have a slightly larger capacity"
Took one piece each and plugged the primer pockets with an upside down primer and then used my new Hodgdon LeveRevolution powder as the media to try and measure case volume.
After five drops and leveling off full cases the Hornady averaged 148.5gr and the Starline avg. was 147.4gr The cases themselves weighed; Hornady 110.7gr., Starline 109.3gr..
So with this short test it looks like the deviation between the two brands is not that great. Being only 0.3gr difference. With the Starline have a slightly larger capacity.
The common capacity measure I'm familiar with, (as it is what Quickload uses),is overflow grains of water in once fired brass with the fired primer still in place. To do this accurately you fill a case with water using an eye dropper until the last drop makes it overflow, then look at the meniscus and match that meniscus when filling the cases on the scale.