loudest gun you own?

My loudest is my 460 XVR with the "full monty loads".

M44 or my 870 ... can't decide yet.

By far, my Mosin-Nagant M44. I have heard few things short of a .50BMG that are louder at the range.

Next one behind that would be either my PTR-91 with flash hider, or my 18" Remington 870 Express Magnum Security model, when using 3" magnum loads. The shotgun, when firing mag loads, has a muzzle flash about the diameter of a basketball. REALLY cool when shooting at dusk.

For me I think it is my AK-47 Pistol. I can feel the blast wave when shooting that thing.

My Mossberg 500.

M44 Carbine or Ruger .30 Carbine revolver. I think the Ruger wins...

Mosin M44.

Guns I own:
Rifle: Ruger M77 MkII .30-06
Pistol: CZ-52

Guns I've fired:
Uncle's Barrett M82

The loudest guns

By far is A broadside from my battleship all nine 16" guns at once,hands down.

My old Winchester break open 12 ga.

I think my M1a bush rifle with the muzzle brake may be louder than my .300 mag.

Also a Ruger .30 Carbine revolver. People at the range look at me funny when I shoot it.

I know it's strange, but nothing I've ever shot is louder than an excam 22lr sa revolver I used to own. Not much in the way of concussion, but man it was a pop!

7mm Rem out a 24 inch barrel.

Some people claim 3" Mag shotshells are louder but I dont buy it. The crack of a rifle hurts my ears more than the boom of a shotgun.

Definitely.

My Remington 700 VTR is 22-250 has quite a crack to it, The porting in the barrel doesn't help much....

Browning A bolt 7mm mag with a BOSS. Guys on the bench next me asked me to leave or wait til they do.

My Mosin 91/30 is a boomer.
Romanian TTC is definitely an attention getter, one guy at the range thought I was shooting .44mag!
While not comparatively loud, my Baby Browning is a rambunctious little sucker, I call it the "Noisy Cricket", kicks pretty good for a tiny gun too.

6" .357 model 66.

I made the mistake of shooting a deer out of a wooden ground blind with it w/o hearing protection. That was 2 years ago and I still have constant ringing, and significant hearing loss from that one incident. *please wear hearing protection, it doesn't make you less manly*

Mosin M44

Hungarian AMD-65

.358 Norma Mag pushing a Speer 250 gr bullet at 2750 fps.

Every time I take it to the range, people ask me, "WTH is that thing"?

16" Mini-14