looking to step into longer shooting 6-800yards on mostly whitetail maybe longer.I stopped to see my local smith today.My choices are to find a action and add all the goodies or buy a sendero and just shoot it.He told me if I dont reload my own shells its a waste of money to go custom at this time(I dont have time for it now maybe someday).I could have a friend load for me.Im thinking of the 300ultra mag how good is factory ammo? Im told the sendoro has an h s stock with alum. bedding blocks?