MOA
Read my previous post!! It's definitely not necessary unless the loads you shoot are "dirty". In other words leaving excess residue in the action and barrel. Optimum loads don't do this. They burn cleanly and efficiently, therfore cleaning the gun should be minimal.
I own guns I have NEVER cleaned!! True, I haven't fired them a super lot, but if it ain't broke don't fix it.
I shoot my Semi-auto pistol a lot, about 4-500 rounds every month. This is a S&W Target model 41 built to very tight tolerances, much tighter than most of the rifles out there, and it only needs cleaning every month or so. The tell tale on this gun is stove-pipe jams. It's gone as long as 1000 rounds without a problem. The load is a clean-burning CCI Std Velocity round.
In my centerfire .45 (SIG 220Sport model built, again, to tight tolerances) if I shoot clean rounds that don't leave a lot of powder residue, the gun will easily go 1000+ rounds without problems. With a dirty load I'm cleaning it all the time. The answer is to shoot optimal loads.
Now with CCI and Remington ammo out there, if the Hornady was a problem, switch ammo to see if the other brands are better.
As I said before, the Hornady shoots very clean in my Anschutz. I'm not even going to experiment with the others.