Natman:
Getting 2100 fps with the Nosler is a lot easier than you think...all you have to do is pick up the Nosler #5 edition and you can see that...their data is for strong actions...ones capable of sustaining 35,000 cup and the Handi's can do that and more...albeit..your shoulder might give out first.....my favorite powder to use is H4198..out my Marlin 1895GS...this has a 18.5 " barrel and I averaged around 2288 fps wiith it...and it will shoot 1"---1 1/4" groups easily...remember to never start out at a max load and always reduce them by 10% and work up 1/2 grain at a time...each rifle will be different...pick up a few good reloading manuals and have fun....by the way...they will tell you what lenght to trim and load to in each manual...the 300 grain Nosler is one of my favorites for the 45-70...
Mac