Good stuff, welcome to the team
I too bought the .21 Savage...and got a great deal, I think the the last versions of the .21 Savage were improved somwhat, I think I got HD dogbones because mine show virtually no wear after 1.5 gallons of hard running. The .21BB is also a good engine, really makes some power if you port it, or install an 8 port P&S
Have fun
TM