The old saying they lack out in accuracy is plainly just a matter of them being handed the incorrect fudder.
Now. As for basically all paper cartridge guns they benefit from the use of a bore rider bullet. This as it index the cartridge in a manner that hands repeatability.
As most molds are US made we opted to cut our own on a CNC. Turned out great in short, notice the singular drive band.
Admitted on the hefty side weight wise, but.. this was NOT a matter of being on the money as far as what was used but one of trying to wring potential out of the piece.
Carbine in case being serial 14243 btw.
Anyways.
What we ended up with is these little nuggets. Due it being a bore rider design, and thus the mainstay of the bullet coming to rest ON the actual rifling and thereby not being housed in the actual chamber, it came to being cartridges that are "roomy" to say the least. These will take an EASY 90 grains of powder.
Thus the ones in the pic, the white stuff within each cartridge is regular rice being used as filler material. Cartridges loaded up with 60 and 65 grains of powder.
Sure makes a Starr a contender, even as far as civil war era carbines go on a whole.
Making this go "klang" @ 100 meters.. and absolute breeze.. Mind you, that there is a rather small "evil Roy".
Here the actual carbine in case. Most likely one of all imported by the French seeing the then upcoming conflict with Preussia in 1870.