Finally got around to determining the case capacity of the fireformed brass, and found it holds 51 grains of water. My Powley Computer equates that to 44 grains of powder. It also suggests using IMR 4064 powder with 110 and 120 grain bullets, IMR 4320 with 130 and 140 grain bullets, and something between IMR 4320 and IMR 4350 for 150 grain bullets. The Powley Computer is set up to make it's calculations on an average of 45K psi. This may be on the upper end of allowable pressure for a Contender, but the pressures can be lowered by using slower burning powders than the ones recommended. The calculated velocities are as follows: 110gr 2750fps, 120gr 2650fps, 130gr 2550fps, 140gr 2450fps, 150gr 2350fps. Unfortunately the throat is very long and precludes the use of the 110 and 120 grain bullets, as there would not be enough, or any, of the bullet in the case if you wanted to get them close to the rifling. That is just as well, since I was planning on using 140 or 150 grain bullets in this barrel anyway. Only through careful load development will I be able to see if these velocities are attainable without excessive pressures. The 7mm Super Bower data that I was able to find does closely resemble my calculations in powder charge and velocity, and it exceeds the data provided by SSK for the 7mm JDJ #2, in some instances. Looks like I got work to do.