I must say I enjoy shooting the 45 more than the 50.
If I had to have just one rifle, it would be the 50...

The 45 will actually out shoot the 50, albeit with a smaller range of projectiles.
The 50 is more versatile, and will shoot a wider variety of bullets quite well.

Why do some guys shoot exotic calibers in center fire?

Team Knight won the Nationals 6 years in a row and I'm told they did it with 45's.
I guess it make the sport interesting when you have more flavors to choose from.

Oh BTW...I'm 57, still work, shoot more than I should, and spend way to much time on forums.