If there was no "twisted tail" on the bottom of the 'ctg', then no, pricking the 'cgt' would not be necessary.
The cap blast would easily penetrate even bond paper to ignite the charge.
Testing would need to be done to 'test' different ctg. designs.
In my rifle ctgs. the base is torn off, the powder drained into the bore - THEN the ctg. and ball are seated on the powder, crushing the ctg. into a wad between powder and ball.
This helps seal the ball from the flame of the powder.
In the revolver, you would still have to use an oversized ball to create a seal between the powder and flame.