Breechplug
Shoot, Ron I'm using T7 and i do not clean mine till the end of the season either and that could be 2 months maybe 3 months. but again I have a had a lot of practice doing this so I know it works for me.
I shoot the gun pre-season, run a windex patch and a Xtreme patch load and go hunting. If I shoot the rifle during the season start the same process over again.