What kind of rifle do you have that you would have to pound a projectile down the barrel in order to seat it? The projectile is supposed to expand somewhat on the way out the barrel. During that expansion is when the projectile is meant to engage the rifling. Perhaps you are on to something with it fitting that tight. I am not sure due to limited experience with the in line rifles.

I am getting an in-line in a few days. I have purchased some T/C .44 caliber 240 grain Cheap Shots and some .45 caliber Hornady 300 grain XTP's to try in the new rifle. Is there any real advantage in loading 150 grains of pyrodex or what ever? I was thinking more of the lines in the 100 grain range.

Also what is a good breech plug grease?

Thanks in advance.