Is there such thing as a quiet centerfire cartridge

[Lon371]

Dinny,

Tinnitus is the ringing you have in your ears.  It is from damage due to exposure to very high noise levels like bombs, rock bands and the first wife.  There are some meds that can help some but basically it is something you have to put up with.  Be careful next time you venture over to the unfriendly part of our planet.

BB

 You forgot M1a1 turbine setting on the ground When I outproccessed back in 90, they let me know I was on a P3 profile for the previous 4 years Was suppose to be on a desk . Real glad I never got the memo. But on the upside, the ringing drowns out useless conversations
 By the way Dinny, you will get use to it. I only really notice it in a quiet room.

Lonny

[NickSS]

The larger the cartridge the more noise it makes.  The shorter the barrel more noise.  Add a muzzle break and the noise level goes way up.  About the only way to reduce noise so as not to alarm everyone in the area is to shoot a smaller lighter caliber.  A 22LR is much quieter than a 22 Hornet and the hornet is quieter than the 223 Rem which is quieter than the 243 Win and so on.  Actually a 270 being a high velocity rifle that burns quite a bit of powder is one of the noisiest standard calibers only to be superseded by the 25-06 and the Magnums.  Suppressors work if you pay the tax to own one and load subsonic ammo for the purpose but all such rifles are fairly short range guns.  So I hunt with electronic ear muffs that let normal sounds through but dampen gun shots.  This is new to me so that is why I have ringing in my ears from 40 years of abuse.

[blacksan]

I was on a P3 profile for the previous 4 years Was suppose to be on a desk . Real glad I never got the memo.

Lonny

H3 before my hearing got schwacked by two explosions and then H4. The funny thing is that my PULHES code was "Picket Fence" with H3......

The quietest centerfire I ever experienced was a 32-20 Marlin (old, unknown model) with a pretty long barrel. I shot that rifle years ago and my buddy still has it to the best of my knowledge.

[mcwoodduck]

The larger the cartridge the more noise it makes.  The shorter the barrel more noise.  Add a muzzle break and the noise level goes way up.  About the only way to reduce noise so as not to alarm everyone in the area is to shoot a smaller lighter caliber.  A 22LR is much quieter than a 22 Hornet and the hornet is quieter than the 223 Rem which is quieter than the 243 Win and so on.  Actually a 270 being a high velocity rifle that burns quite a bit of powder is one of the noisiest standard calibers only to be superseded by the 25-06 and the Magnums.  Suppressors work if you pay the tax to own one and load subsonic ammo for the purpose but all such rifles are fairly short range guns.  So I hunt with electronic ear muffs that let normal sounds through but dampen gun shots.  This is new to me so that is why I have ringing in my ears from 40 years of abuse.

But how do you explain the 32 Rim fire I had that was hammer strike, a golf clap report, and a bullet strike louder than the report and the 32 is larger than the 22 or the 22 Hornet.  But it too make aweful zinging noises when hitting a rock past the target.

[gcrank1]

Over speed of sound = sonic 'crack'. I think the point he was making is that as the cartridges get 'bigger', ie, more powerful, they are exceeding the SOS and with larger case capacities there is more muzzle blast, all resulting in more noise.
(I know you knew this...it was just a test, right?)

[quickdtoo]

So far lots of irrelevant discussion, I don't think there's a round or firearm capable of satisfying Adam's requirements.

Tim

Anyone out there know of a relatively quiet say .17hmr/ .22 mag noise level in a centerfire under .270 cal with decent ballistics out to 350-400 yards for coyote sized game.

Thanks for the reply's

[OBXPilgrim]

Come on guys, bore size doesn't have that much at all to do with it.  Speed, speed, speed.  I've shot .44 Magnums - loaded down to cat-sneeze cast bullet loads that were quieter than most .22s- especially HV 22s.  If you are talking about factory loaded stiff, that's going to be tough.  

Cast bullet reloads - just up to your imagination.   Check the castboolits site or the cast bullet association forums for lots of info.

[petemi]

So far lots of irrelevant discussion, I don't think there's a round or firearm capable of satisfying Adam's requirements.

Tim

Anyone out there know of a relatively quiet say .17hmr/ .22 mag noise level in a centerfire under .270 cal with decent ballistics out to 350-400 yards for coyote sized game.

Thanks for the reply's

Tim, sure there is.......it's a FTF in any caliber

Pete

[mcwoodduck]

So far lots of irrelevant discussion, I don't think there's a round or firearm capable of satisfying Adam's requirements.

Tim

Anyone out there know of a relatively quiet say .17hmr/ .22 mag noise level in a centerfire under .270 cal with decent ballistics out to 350-400 yards for coyote sized game.

Thanks for the reply's

270 Wren? (22 hornet opened to 270.)  
6.5 Whisper.  Will hit with the same power as a 22LR at 300 yards and will have a rainbow trajectory but it will do the job.
Other than that I think he is looking at a supressed gun if legal.

[quickdtoo]

Yeah, sure it will!! 

Tim

[mcwoodduck]

LOL
I think the harder thing will be mounting the Mortor sights and the tripid onto the Rifle. and hoping for a between the shoulder blade hit.
 

[quickdtoo]

I doubt that any .264" or .277" bullet would have effective terminal performance at 350-400yds nor would be as quiet as a 17hmr burning 3-4 times as much powder.....and then there's the 140" of drop!!

Tim

[mcwoodduck]

What would be the difference between a 120 grain .246 bullet leaving at 1100 FPS and a 115 grain 9mm bullet leaving a pistol at the same 1100 FPS.  My Broom handle Pistol in 9X19 had sights that were graduated to 600 Yards and joking around I could hit the pump house on the farm and poke holes in cinder blocks at 400 yards with it off the hood of my truck (would drive down the farm road for just under .3 of a mile).  but someone in the Mauser Factory figured out if the tangent sight is set at this angle the barrel will be at this other angel and the bullet leaving the barrel at 1100 FPS will drop X feet and it will be close as a foot away.  Yes, the cinder blocks were the wall of the pump house. The 22 LR at 50 yards only cracks a cinder block.  I do not see a Coyote hide being tougher than a cinder block.
Wouldn't the 6.5 (.264) bullet retain more velocity due to the longer skinnier bullet?  And yes the 140" drop would need the sights off a mortor to be close. Along with hundreds of rounds of ammo and hours on the range to take a shot with any hope of making a clean kill.  After all you can equate this to Billy Dixons 1 mile shot at the battle of Adobe walls with either a 45-90 or a 50-110.  not leaving the front of the gun with a great deal of speed in relation to the size and mass of the slug and carring over 5,280 feet slowing all the while still killed a person and I am sure it was well over a 140" drop.  But Billy shot his Buffalo rifle for hundreds of hours and thousands of rounds before taking that shot. And to make a clean hit with any of the sub sonic rounds will require long range sessions to know the rifle and round.
I do not want to argue with you Tim.  You know your ballistics better than I do but I still think the answer is yes it could be done.  The next question of SHOULD it be done is a different question.
Trying this with a 17, 22 mag, 22 Hornet would only be quesses as well and I would suggest getting closer with either calls, bait, or stealth and get the coyote with in the 150 yard kill range of the rifles listed, go to a supressed rifle and use full house loads to the loud hand clap with a 223, 22-250, or 243 Win.  I was shooting regularly for a long time and i would not try a 400 yards shot on a coyote as I did not have enough long range practice and you are being irresponsible if you try to shoot that far with out practice and mastering those shots.

[Yak Angler]

I wish i could use a suppressor where i live, would have one on every gun i own if i could,  but they are for police and military only in Canada.

For those that have them i know the reason for shooting sub-sonic loads but if you shoot regular speed loads how loud is the sonic crack really going to be compared to the normal muzzle blast of shooting an un-suppressed rifle?
I would think it should still make a huge difference to the noise level.

[blacksan]

I wish i could use a suppressor where i live, would have one on every gun i own if i could,  but they are for police and military only in Canada.

Odd, I have a friend in the UK that is an avid shooter with a nice collection. All of his rifles are suppressed (moderator over there) and they are exspected/prefered to use them for hunting and don't require a tax stamp like they do in the US. His are all made by the local smithy and appear to be of fine quality from the pictures I've seen.   

[Yak Angler]

I wish i could use a suppressor where i live, would have one on every gun i own if i could,  but they are for police and military only in Canada.

Odd, I have a friend in the UK that is an avid shooter with a nice collection. All of his rifles are suppressed (moderator over there) and they are exspected/prefered to use them for hunting and don't require a tax stamp like they do in the US. His are all made by the local smithy and appear to be of fine quality from the pictures I've seen.    

I have heard that they can use them in the UK, but Canada is a different country  

Would be the cats ass for hunting if i could use them here.

[geezer56]

For what is worth, which is not much I expect-A 45-70 with a long barrel, BC for example, with a heavy cast bullet and a small charge of Trailboss is vewwy vewwy quiet.  The trajectory, on the other hand, rules out anything but 25 yd or so shots.  A whelen and cast also can be loaded way down to cat sneeze territory.  Speed is needed for a flat trajectory, unwanted for the noise it produces.  Without a can, you can't easily get there from here.  I've been trying for a few years to do just what you are looking to accomplish.  The closest I've come is with a 30-30, 200+ grain lead bullets, and tiny charges of powder.  The rainbow effect is the problem, the slow, heavy projectiles retain a lot of energy, but hitting a target at long and unknown ranges is problematic to say the least.

[gcrank1]

I think you have seen from the replys that the physics preclude what you originally asked, but perhaps we could look at what could be 'relatively' quiet compared to factory, or top velo reloads. If you load down a bit in any caliber you will get rid of some of the snort that may get you into that balancing point of acceptable noise and reasonable trajectory. Some powders may be more efficient in your barrel length for the bullet weight of choice and have noticably less muzzle blast. They may also not be too far off from your needed velo because that extra muzzle blast does little, if anything, for more velo.
If you have a decent range finder, and get to know your reduced load's trajectory at different distances, you may find your hits are where they need to be. The trajectory may be much better than those used years ago when some fine long distance shots were made.
I think you can find that load if you play with it a bit.

[Yak Angler]

I have thought about playing around with powder types. I am just getting into relaoding for my .270. The equipment just got shipped yesterday so i should have some of what i need to get started. My .270 handi is a 22" barrel length. I know most shotgun and pistol powders burn much faster then rifle powders typically do. I suspect like you mentioned some of powder is still burning when the bullet leaves the barrel increasing the muzzle blast and at that point not adding any additional speed to the projectile either. From what i have read the typical powders used for the .270 are some of the slowest burning of the rifle powder types.

My hopes were to load a light weight bullet for the .270 something in the 100-110 grain weight with the fastest buring powder charge i can safely get away with for that bullet weight. hopefully the powder will be burnt by the time the bullet reaches 18-20" down the barrel which should also reduce the muzzle blast. Atleast this makes perfect sense in my mind for what thats worth 

[gcrank1]

Adam, you have got the idea well in hand. I dont load for the .270 so other vioces here can be more specific, Im sure, but I should think that rifle powders in the IMR3031 and faster range would be good.
I like H335 and AA2230 for jacketed loads and have used quite a bit of IMR4227 also, but mostly in reduced velo lead bullet loads.
Before you buy some powder, lets get some suggestions from .270 owners for those weight bullets with your lower db criteria.