Using a .30 cal Mod on a .223 How Much Difference?

[springbok787]

I have both a .308 and a .223 with the same thread type. At present I only have a .308 mod and I am debating with myself if I need to bother shelling out another £200+ on a second mod. The rifle is a Blaser so the its actually only one rifle and two barrels. If it was two separate rifles that could be used at the same time I would be more inclined to buy a second mod.

My question is how much efficiency am I loosing by using my .308 mod on my .223? Will I even notice a difference? Anyone have any practical experience of doing this?

 

[Rusty Gate]

Why not try it...

 

[Kjf]

If you can afford it buy a separate mod. If you cant just use the one you have on both riflesittl work and you wont know the difference unless it severely affects accuracy

Just crack on

Kjf

 

[Orion]

I've used a .30 cal Wildcat Evo on my 22-250 and it didn't appear to have any detrimental effects as to where the bullet went and what it did when it got there. However it didn't have anywhere near the same sound attenuation that a dedicated .22 cal moderator had and made a very strange 'ringing' sound as well.

A simple internet purchase from Wildcat and change over to a dedicated .22 diffuser (baffle) and it works very well now.

 

[Robek1980]

Personally when i bought my 223 it was sold with a .30 cal Hardy gen iV ... was loudish ... then i have PXed int he hardy and got a .223 wildcat evo .... massive difference ... for 2 reason A) 223 is tighter around the bullet so the sound waves can equilibrium better B) i think the wildcat evos have better baffle system ... saying this as i have a evo bridge and front for my 30.06 and i also have a dedicated non magnum dpt SS for the same rifle ... evo is quieter BUT i still use the DPT as it is lighter and better for that rifle in my opinion. Hope this helps

 

[Miki]

The amount of suppressed sound will be less on a moderator relative to the size of the hole/bore and its internal volume (there are a few other factors, but they are the main two). Put another way, if the internal volume is the same, the dominant factor becomes the size of the hole, ie the closer the bore matches the diameter of the bullet the quieter it will be.

Will you notice stood next to it ? ... probably not as you have an automatic sound deadening circuit in your ears. However. If you were some distance away (3/400yds for example) then yes you would. I run 20cal DPT's on my .22 as the design offers sufficient clearance for a .224 cal bullet on my T3 and CZ. With a magnum vertex chamber the subsonic .22LR is a quiet as an air rifle, the smack of the round hitting the rabbit/crow is louder. Last week, I tried the .22LR with my 6mm baffle stack and it was a lot louder in and around the farm buildings but sounded only slightly louder out in the field.

If you have a moderator that is modular then you can buy (and have posted to you) the baffle stack. Don't mix them up though as a .30cal bullet will not pass through a .22 baffle...

 

[monarman]

Currently running a hardy 30 cal on my 223....... yes its louder than a t8 in 22 cal but
Its shoots really accurate and is lighter..... and the things I kill dont notice lol...... its upto you if you want to spend more money..... but under field conditions it's not even worth thinking about (assuming its accurate enough).....
I have several mods all in 30 cal and they are all similar in sound but some handle different to others.... the dpt magnum was a bit jumpier than the ase sl5 and the hardy allows better follow through than all of them.... including the dedicated 22cf muzzle mounted pes that I originally had on my 223.

 

[PeterH]

I have a mod for my 6.5 which is an 18x1 thread which is the same thread size as my 22.250 ad 20 Tac so it goes on all three. Sound difference? yes probably. Certainly does not affect accuracy.

Personally I would rather have a mod a couple of decibels higher than risk the chance that I put the wrong mod on and see it fly off down range.

 

[springbok787]

Cheers all I have just ordered a .223 mod.

 

[rarms]

I use a .30cal mod on all my rifles and I don't think it makes much difference. Use it on my .223 AR and it is pretty quiet!

Certainly wouldn't bother buying a second one to use specifically on the .223

 

[1tikka]

I use a .30 cal on .223 and .308 and always have, for the last 25 years, to my ears any difference is academic using the same mod on both calibers. However, I find the biggest difference comes not from the bore size but from the different manufacturers, and there lies a whole debate of preference in respect of manufacturers, but certainly not on bore size between .223 and .308. When I started 40 odd years ago, nobody had moderators, except paker-hale ones on .22 rim-fires for using sub-sonics on bunnies. Hence because of 40 odd years center fire, my ears now suffer. As for foxy, it's irrelevant the noise your rifle makes if you hit him!!! So at the end of the day, it's about what your ears detect, and the difference between un-moderated and moderated is so vast, that's the real issue, to use a moderator or not, caliber is irrelevant. Your's constantly saying "You What" and hearing the misses say, "turn down that telly"

 

[Sonicdmb73]

I have both a .308 and a .223 with the same thread type. At present I only have a .308 mod and I am debating with myself if I need to bother shelling out another £200+ on a second mod. The rifle is a Blaser so the its actually only one rifle and two barrels. If it was two separate rifles that could be used at the same time I would be more inclined to buy a second mod.

My question is how much efficiency am I loosing by using my .308 mod on my .223? Will I even notice a difference? Anyone have any practical experience of doing this?

I will tell you my experience with slightly a different calibre combination.
Both my mate and I have CZ550’s in 243 we both have the same make of moderator. Except mine is a 30 cal his for 6mm.
There was a noticeable difference in volume between them using the same ammunition firing at the same target from the same firing point.
As you can see the only difference is hole size.
If I wasn’t using the same mod on two different calibre’s I would definitely have a calibre specific one. But it is good enough for me and I am a tight bugger.
Try it for yourself see if you can live with it. If not something like the Hausken MD45 (iirc) cheap and effective

 

[Muir]

With the exception of 22RF/Hornet, all my suppressors are 30 caliber and I use them on 223s.,6.5s 30 calibers and 7.62x39.~Muir

 

[Sonicdmb73]

With the exception of 22RF/Hornet, all my suppressors are 30 caliber and I use them on 223s.,6.5s 30 calibers and 7.62x39.~Muir

If you could buy them as easily as we can. Would you buy calibre specific though?

 

[Edinburgh Rifles]

Sound attenuation is significantly increased by reducing the radial clearance between bore and bullet

the reverse is also significant

http://new.ersg.com/wp-content/uploads/2018/08/Mod2.png

 

[Muir]

If you could buy them as easily as we can. Would you buy calibre specific though?

Good question. I am told by those that have both 223 and 30 cal in the same make as mine that the 30 cal on the 223 is quieter than if the 223 suppressor is used. One suppressor caliber makes things simple: if I have an adapter on the 223 I'm good to go with one can. Were they easier to get I stilI wonder if Iwouldn't just standardize anyhow. I am a cheap son of a gun.~Muir

 

[Miki]

Good question. I am told by those that have both 223 and 30 cal in the same make as mine that the 30 cal on the 223 is quieter than if the 223 suppressor is used. <snip>~Muir

There is a whole bunch of logic that would make that statement difficult to believe and harder to substantiate. The expanse of hot gas that is pushing the bullet through the moderator is travelling faster than the bullet and is at a considerably higher temperature and pressure than the atmosphere it is venting into. The 'bang' we hear is that hot, high pressure gas, bursting out into considerably cooler air sitting at (roughly) 15psi.
The larger the hole the louder the bang, the less the bullet blocks that hole the more high pressure, hot gas escapes and the louder the bang.
It would also follow that, the greater the charge, the louder the bang.
A 30cal through a 30cal moderator is efficiently suppressed.
A .224 bullet through a 30cal moderator isn't.
It may not be any louder than the 30cal round because the .223 charge is less and the relative volume reduced however, the .223 when fired through a cal specific moderator (with a similar suppression characteristic), that has a bore with less radial clearance and is therefore efficient, 'will' be "less loud".
Whether that matters or is an advantage to you (or not) is another question entirely.

 

[Muir]

There is a whole bunch of logic that would make that statement difficult to believe and harder to substantiate. The expanse of hot gas that is pushing the bullet through the moderator is travelling faster than the bullet and is at a considerably higher temperature and pressure than the atmosphere it is venting into. The 'bang' we hear is that hot, high pressure gas, bursting out into considerably cooler air sitting at (roughly) 15psi.
The larger the hole the louder the bang, the less the bullet blocks that hole the more high pressure, hot gas escapes and the louder the bang.
It would also follow that, the greater the charge, the louder the bang.
A 30cal through a 30cal moderator is efficiently suppressed.
A .224 bullet through a 30cal moderator isn't.
It may not be any louder than the 30cal round because the .223 charge is less and the relative volume reduced however, the .223 when fired through a cal specific moderator (with a similar suppression characteristic), that has a bore with less radial clearance and is therefore efficient, 'will' be "less loud".
Whether that matters or is an advantage to you (or not) is another question entirely.

I would have agreed with you in principal but I guess it depends on which suppressor you own.

"In recent tests, we found that our own exclusive silencer, the BANISH 30, was quieter on a .223 than a .223 silencer was."

This is from "Silencer Central" in the US. (Formally Dakota Sillencer) They market the 9-baffle titanium suppressors I have. The Question was whether or not it was effective to use a 30 cal suppressor on a 223 or other sub caliber. They seem to think so. I know my 223 with my 30 cal suppressor is very quiet.~Muir

 

[MTLEADFARMER]

Dakota 30 cal is 2" longer with 2 more baffles than the Dakota 224 so it is quieter (they claim) even though the end cap is bigger. That being said I really can't tell the difference in sound between the them. 2" shorter doesn't seem like allot but the difference is huge when hunting and getting in and out of vehicles. I still run 30 cal cans on smaller calibers but when I have the option I go for the shorter can for mobility. I've run 223 through my 338 can its very quiet but it looks ridiculous hanging off the end of the barrel.

 

[Edinburgh Rifles]

I would have agreed with you in principal but I guess it depends on which suppressor you own.

"In recent tests, we found that our own exclusive silencer, the BANISH 30, was quieter on a .223 than a .223 silencer was."

This is from "Silencer Central" in the US. (Formally Dakota Sillencer) They market the 9-baffle titanium suppressors I have. The Question was whether or not it was effective to use a 30 cal suppressor on a 223 or other sub caliber. They seem to think so. I know my 223 with my 30 cal suppressor is very quiet.~Muir

Not a like for like comparison
Take the same moderator with two bores and run the smaller calibre bullet and I can’t see any way the large ransoms bore will produce greater sound attenuation

One mod with small bore Andy low efficiency against another mod with high efficiency design is not a comparison

Three things make the sound attenuation better
Bore
Number of baffles
Chamber size