I'm new to shooting my .44 magnum colt anaconda and have read where the brass should have a crimp so the bullets won't push back into the shell and end up with compressed/dangerous loads. Is that so? And if so, where can I buy the crimped brass and what kind is recommended? Thanks, Mike

You have it just alittle backwards. The problem with revolvers is when the gun recoils backwards then the bullets want to stay behind and without a heavy crimp they sometimes will start to pull out of the case. If they come out farenough, then it will tieup the gun and not let the cylinder rotate. There is not a special crimped brass, you can use any manufacturer. I like Winchester the best. Rem seems to be alittle softer and will start to give sticky extraction at lower pressures. My buddy likes Federal better than Winchester, I haven't tried the Federals though. Some people recommend the Starline, but I haven't tried it either. Winchester has worked well for me with many +P reloads. If your new to reloading, then staywithin the published loads with given bullets, If you get a load from a forum, then check it first in a couple of different load manuals. You will set the crimp on your seater/crimp die. Back the die out and run the seating stem in in small steps to seat the bullet to where the crimp groove or canalure is even with the case mouth. Then back the seating stem out and run the die down until you get a good crimp. Then with the ram up and loaded round inplace, screw the seater stem down until it touches, I always give it just a little tweak more and lock it in place. For heavy bullets and higher velocities you will need a fairly heavy crimp. If you go with too heavy of crimp you can buckle your cases. This is something that you will just have to play with, shoot 5rounds and check the 6th one.
Good luck.