I found 2 - 22 TCM cases at the range. They've been sitting on my desk and I look at them from time to time. I decided to build on that speculation a bit.
Measuring the case capacity on the unsized case I get a capacity of 15.8 grains of water. I guessed the seating depth and came out with a max charge of 3 grains of Trail Boss. I need to recheck that as Hodgdon shows only 4 grains in the 223 with a 55.
So the speculation. In the RIA M22 rifle with a cast and powder coated 40 grain boolit, what velocity would you speculate? Factory ammo seems to fire at 2700 fps and I have no interest in that. I'm talking 22 or 22 magnum velocities as a target.