If the shell is cut down from 2 3/4 to 2 1/2 then no additional pressure factor need be considered, given the 2 3/4 fits the data is acceptable in the 2 1/2 inch chamber. I use the general limit of a projected PSI no greater than 8.000 PSI as my limit, though I am probably being too conservative. That said we all determine our risk tolerance levels.


Michael Dittamo
Topeka, KS