You definitely want to go with a .50 cal ML of whatever brand you choose, due to the larger availability of components. You can buy an ML "on the cheaps" such as a Traditions or a more expensive one like a TC. You could also take a look at the Savage 10ML-II, as it will also shoot smokeless in addition to BP substitutes. Check out http://dougva.proboards34.com/index.cgi?for info pertaining to the savage on the savage thread. Awesome ML!