perry modern observations

[Kurt]

Bruce.
I can see an advantage in that.
You eliminate the variances of the inside case inconsistency. But you also have to keep the conditions the same so you don't vary the powder stack in the muzzle loader.
I see a lot of difference using cases that have the same inside volume and especially case neck thickness. This is something you don't need to fight with the M/L. Pope also reloaded the same brass case along with breach seating the bullets.

Kurt