Groo here
For out bullet designers.
Now that we have 10mm revolvers, a new boolet is needed.
I though a 180 to 200gr [ or 220] with 2 crimp grooves.[or front driving band]
one for factory length [auto] loads and one for 10mm mag length loads [ I know they won't work in an auto]
I have a Ruger GP100 10mm WC 3in.
The cylinder [with case] is 1.62 +- some Call it 1.6in..
The 10mm mag is 1.555in and the 10mm is 1.26 in.
As these guns have been converted to 10mm mag all ready.
The correct design boolet would allow the 10mm mag OAL and loading data but 10mm cases could be used.
Note . this is just for revolvers.....