Hi Rickster!
I found the same thing as far as case capacity. I wasn't suprised by that as much as I was by how stout and short the 250 HP case looks beside the Remmy. Had UMC used a design with the shoulder pushed forward it could have been identical I bet. The way it is the 25 Rem looks to be built for shooting cast with the long neck.
I loaded up a dozen 25Rem last night using 29gr of H380. 117gr Hornady seated to 2.540" is perfect for the crimping on a trimmed case. It should be just short of 2300 fps.
Will be shooting for groups with the model 14 and the model 8. Will be the first time for using the aperture on my model 8.
Be interesting to see how the same load works in two totally different rifles.
Will also be trying the 250 HP, 30-40, 7x57 and maybe even an 1100 Husqvarna in 06 if I buy it tonight.
Hope to post favorable results upon my return.