Breech plug timing

[romoshka]

Ok, I’m the fool whose undertaking my first build from a Frankenstein box of parts ( see parts and instruction thread and breech plug install). I have now found the lock…YAH. So from a bit of engine building…way back in time and and a machinist education I’m mulling over timing the breech plug as the plug currently lacks 0.143 from contacting the lands in the barrel. Some may recall a product called plastigauge used by engine builders back when I was a teen and dinosaurs roamed. Not sure it’s even available today (Kasenite isn’t ) but thought it might be helpful as i got close before switching to blueing technique. Any thoughts from this esteemed collective?

 

[ChuckJonesWagon]

There's a discussion about that subject here: https://www.muzzleloadingforum.com/threads/breech-plug-install.188871/

 

[billraby]

Maybe this will help

 

[Kansas Kid]

Plastigage is still available. Measure the length of the thread journal and then the depth to the counter bore. Do a little math. Some dykem or a magic marker on plug face when you’re sneaking up on the ideal fit.