:)Hey !!
As has been alluded to above, there can be/are certain relationships that have to be consider when one is selecting one's particular projectile. Principle of course, the the relationship of the Cylinder Chamber Throat to Bore (groove diameter). This comes especially to the forefront when considering lead projectiles. With out knowing the specific bore diameter, bullet selection becomes a "crap shoot"
Also of huge importance are the chamber Throats. Primary purpose of the throat is to maintain bullet alignment from the cartridge to the bore. The problem enters when the throat is sub bullet/bore diameter. After one determines Bore, then a projectile, half a thou or a full thou over groove diameter is recommended. Then the Throat should be the diameter of the projectile perhaps plus half a thou. If the throat is sub-size, it will first act as a tiny "bore obstruction" boosting chamber pressure and increasing "felt recoil." Then the Throat swages the bullet to that sub size and the bullet just kind of rattles down the bore, increasing leading and contributing to inaccuracy. Usually.
So how is it then, when we swage a Round Ball down in the Chamber, well sub bore diameter, the stupid thing will group just fine. Shooting just as accurate as most suppository shooters. Atz Oxymoron. Really. So, why don't we just skip ALL of this super technical fecal matter and just load Roun Ball in our Suppository Shooters???
Harrumpff