Gas Check .44 mag bullets

[samgreeniam]

I just got a couple of boxes of RimRock Bullets .44 Mag 240gr SWC HP gas checked bullets I wanted to try. Anything I should know that is much different than loading the PB SWC bullets? I'll be using 2400 powder and will start with 18.5-19.5 grains. They claim a BHN of 15.
Nice looking bullets BTW

 

[Clarke123]

RimRock makes some really good projectiles ... Buffalo Bore uses some of their's in commercial loads (maybe not this particular one?)
You might want to call RR for some advice as well.