Maybe i wont replace the vent liner! I just fired 2 shots and used Maybe 1.5 grains of 4f in the pan and it went off fast! I think the enlarged vent + dropping the pan charge down greatly was a good thing. The tom fuller flint is still doing an amazing job.

Also decided that i'll order my GPR in .54cal flintlock and then order a .54 percussion barrel and lock. $94 for the .54 percussion barrel! Shame the lock is going to cost me damn near $70