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dsavery1
Guest
Has anyone used a 30br with heavy bullets like 168 -220 and loaded them down to subsonic speed to work with a silencer? And what twist and length of barrel should be used any info would be great.
E
eww1350
Guest
DS...a friend of mine wanted a subsonic 30BR we tried a 1-10 twist Krieger barrel on a 40x action barrel was 20 inches long (less suppressor) it was a nightmare to get a good sub-1088fps load to shoot accurately...I would suggest a least a 1-8 twist...and use the Lapua 200 grain SubSonic bullets made specially for that application...You can buy them from MidwayUSA...
Our best loads were made with AA-#7...I think..??
Good Luck..
Our best loads were made with AA-#7...I think..??
Good Luck..
D
DaRealViper
Guest
I've used Unique powder 5.1g grains with 115gr Bullets in a 6.8 SPC. Slightly less case capacity than 30 BR have loaded .308s 30-30 300 Savage etc.
Trail Boss is a good powder lots of Bulk density. I would suggest 150gr Bullets for 10 Twist Subsonics Ive loaded 170gr laser cast subsonic with crud accuracy. 110 125 130 150gr do not try 147gr FMJBTs they suck at normal velocities. Try 10gr Trail Boss 150gr Spire Point. Winchester Primers. Test over a chronograph until desired velocity accuracy achieved.
Trail Boss is a good powder lots of Bulk density. I would suggest 150gr Bullets for 10 Twist Subsonics Ive loaded 170gr laser cast subsonic with crud accuracy. 110 125 130 150gr do not try 147gr FMJBTs they suck at normal velocities. Try 10gr Trail Boss 150gr Spire Point. Winchester Primers. Test over a chronograph until desired velocity accuracy achieved.
I haven't tried it but my belief is that it's a pretty large case for this application........ capable of near .308Win velocities across the boards.
al
You can go to www.quarterbore.com and look at alot of this stuff as its been out there for quite some time.
You can also check out J.D.Jones website at www.sskindustries.com as he has alot of cartridges using subsonic loads.You can even use 50 bmg bullets and build a very nice subsonic round if you want.
Waterboy
You can also check out J.D.Jones website at www.sskindustries.com as he has alot of cartridges using subsonic loads.You can even use 50 bmg bullets and build a very nice subsonic round if you want.
Waterboy
On the barrel length go as short as is legal and add a inch just so you don't get into any trouble.Barrel length adds velocity so you don't want it.Your silencer will probaly end up being almost a foot long as well.
On the twist if you go 8 twist or even 7.5 twist you can shoot the 240 Sierras but finding barrels in these twist rates isn't cheap.You'll probaly end up spending as much as on a target barrel.
There are alot of things that can be done to the bullets to make them shoot better like seating them in the case backwards or trimming them very short but I don't want to post it here as it will start a fight.When you get the gun up and running e-mail me and we can discuss it.
Lynn aka Waterboy
On the twist if you go 8 twist or even 7.5 twist you can shoot the 240 Sierras but finding barrels in these twist rates isn't cheap.You'll probaly end up spending as much as on a target barrel.
There are alot of things that can be done to the bullets to make them shoot better like seating them in the case backwards or trimming them very short but I don't want to post it here as it will start a fight.When you get the gun up and running e-mail me and we can discuss it.
Lynn aka Waterboy
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Peter
Guest
Al's got it exactly. Waaaay to much volume. I messed with this for weeks till I figured out a 300 Whisper already does it better with less expensive brass. Now if you want to talk 338 BR using 300gr bullets....
Al's got it exactly. Waaaay to much volume. I messed with this for weeks till I figured out a 300 Whisper already does it better with less expensive brass. Now if you want to talk 338 BR using 300gr bullets....
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Hover to Enlarge Lapua Subsonic Ammunition 308 Winchester 200 Grain Full Metal Jacket Box of 20
Product #: 998404 | Manufacturer #: 4317340
Status: Out of Stock, Backorder OK
Date Expected In-Stock: 10/15/2009
Quantity
Our Price: $48.49
Pete
If the 30 BR case is too large why does Midway USA sell factory new subsonic Lapua ammunition in 308 Winchester?
Waterboy
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Peter
Guest
My guess is they enjoy selling ammo to folks that dont know any better.
that have hunting rifles with barrels in excess of 16" and thrive on erratic velocities that likely have twists too lazy to stabilize boolits at 1040 fps Other than that your guess is as good as mine.
Pete
My guess is that normal people won't have any problem at all using a 30 BR case at subsonic velocities if they use common sense.
My guess is that Lapua knows what they are doing and that there is nothing erratic about there ammunition.
My guess is that they sell it because it is more common than the responders on this forum realise.
My guess is people have been down loading it since the cartridge first came out without the problems you are having.
My guess is that if you use the right powder you won't have all the problems you seem to be getting.
My guess is if you tell 500 people the correct way to do something 400 will ignore you and do it there way.Seventeen will nod there head to everything you say and not be able to tell you which cartridge you are discussing.Fifty Three will do as told and have no problems at all.Thirty won't even attempt it after listening to the horror stories they read about on forums like this where it shouldn't even be talked about especially by those who have never done it.
My guess is if you can't spell bullets you are doomed from the start.
My guess is you didn't use a filler.
My guess is you didn't use Trail Boss.
My guess is using Trail Boss which is designed to fill the larger volume cases will help.
My guess is if your gun has the wrong twist barrel it doesn't matter what velocity your shooting as wrong still means wrong.
My guess is the 30BR has less volume than the 308 Winchester so its actually a better candidate.
But then again those are my guesses.
Waterboy
My guess is that normal people won't have any problem at all using a 30 BR case at subsonic velocities if they use common sense.
My guess is that Lapua knows what they are doing and that there is nothing erratic about there ammunition.
My guess is that they sell it because it is more common than the responders on this forum realise.
My guess is people have been down loading it since the cartridge first came out without the problems you are having.
My guess is that if you use the right powder you won't have all the problems you seem to be getting.
My guess is if you tell 500 people the correct way to do something 400 will ignore you and do it there way.Seventeen will nod there head to everything you say and not be able to tell you which cartridge you are discussing.Fifty Three will do as told and have no problems at all.Thirty won't even attempt it after listening to the horror stories they read about on forums like this where it shouldn't even be talked about especially by those who have never done it.
My guess is if you can't spell bullets you are doomed from the start.
My guess is you didn't use a filler.
My guess is you didn't use Trail Boss.
My guess is using Trail Boss which is designed to fill the larger volume cases will help.
My guess is if your gun has the wrong twist barrel it doesn't matter what velocity your shooting as wrong still means wrong.
My guess is the 30BR has less volume than the 308 Winchester so its actually a better candidate.
But then again those are my guesses.
Waterboy
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Asa Yam
New member
It is possible the .308 cases may have been partially filled with epoxy. Been done before.
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Peter
Guest
Since you're a stickler for spelling its THEIR not THERE (second sentence in your response) .... bet you feel smart now!
The fact remains that the 221 case is more efficient and easier to load for.
Reduced capacity 308 cases work well.... you need to get to where it'll hold 10 grains of Trail Boss and be completely full.You'll still be relegated to using light bullets.... which I imagine is like kissing your sister,since real Whispers were designed to slam the intended target with heavy projectiles.
Trail boss doesnt work in a 30 BR or an unaltered .308 (it has been discovered to be position sensitive) or 300 whisper or 458 SOCOM... tried it....
My guess is you dont shoot much subsonic....at least to any degree of accuracy after reading your response. There's a lot more to it than getting the boolit to exit the barrel slowly.Have a nice life
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Pete
I'm not wanting to jump on your case but I've got all the guns you've mentioned and even shot subsonic loads in my 50 BMG.
I believe if you send a private e-mail to Alinwa he might be able to show you some pictures of what my titanium 50 bmg suppressor looks like? If your willing to spend $10,000 or more you can make your own.Mine has over 20 baffles in it.
I am truly sorry your guns don't shoot but maybe your confusing the accuracy of a 30BR bench gun with that of a subsonic gun? I already know your load is all wrong because you keep mentioning the erratic velocities which are very common to subsonic ammo from a guy not knowing what he is doing in his reloading.When you couple that with your statement that 10 grains of Trail Boss doesn't fill a 308 case very full I know full well that you've never even tried it.
Its too bad you didn't ask any questions on how to fix all of your reloading problems rather than saying it can't be done.I find it is much more accurate just to say--- You don't know what your doing rather than it can't be done.
Waterboy
I'm not wanting to jump on your case but I've got all the guns you've mentioned and even shot subsonic loads in my 50 BMG.
I believe if you send a private e-mail to Alinwa he might be able to show you some pictures of what my titanium 50 bmg suppressor looks like? If your willing to spend $10,000 or more you can make your own.Mine has over 20 baffles in it.
I am truly sorry your guns don't shoot but maybe your confusing the accuracy of a 30BR bench gun with that of a subsonic gun? I already know your load is all wrong because you keep mentioning the erratic velocities which are very common to subsonic ammo from a guy not knowing what he is doing in his reloading.When you couple that with your statement that 10 grains of Trail Boss doesn't fill a 308 case very full I know full well that you've never even tried it.
Its too bad you didn't ask any questions on how to fix all of your reloading problems rather than saying it can't be done.I find it is much more accurate just to say--- You don't know what your doing rather than it can't be done.
Waterboy
Well after pulling a few searches of subsonic loads I found most had good results with TrailBoss. I took DavefromGA’s load of 9.3 and adjusted for it my rifle. A Gap SP .308 20”rock 1-11 with shadow can. Here’s what I loaded
Case: LC90
Powder: TrailBoss 9.6
Bullet: 180 RN Hornady
Primer: CCI 250
Loaded with Lee Deluxe Dies, Powder dropped using a lee perfect powder measure only weighed 1st and last round (50 total).
Here’s a pic of the target at 200yrds. I think it works…
308 Loads
16" Krieger 1/10
220 Hornady RNSP
10.7 gr of Trail boss
1040 fps
mag primers, win cases
3/4-1" groups at 100
not temp sensitive or powder position sensitive
slightly louder than loads with Green dot or other pistol powders, but more reliable. Add water and it's super quiet
200 gr Lapua Subsonic, 10.0 gr Trail Boss, WLRM, 2.20" O2H
967 fps @ 70F
Come-ups
100 yds, 4.2 mil
200 yds, 9.2 mil
280 yds, 14.2 mil
1. AWS, 16" 1/9",w/Sound Tech 20" Integral AWS Suppressor installed, AI 30mm/28MOA scope mount w/ Leupold MK4 4.5-14x50mm:
Case: Federal Gold Medal
Primer: CCI 200 Large Rifle
Powder: IMR Trail Boss
Bullet: Lapua 200gr. Sub-Sonic B416
Starting Load: 9.6gr (985 fps average)
Work Up: loaded to 10.2 (1032 fps average)
Remington M700, 16" 1/10", War Tech Tensioned Barrel System w/ST Black Star 8" installed, H&S 5R stock and bottom metal, Leupold MK4 1-piece base, Leupold MK4 1" Medium alloy rings, Bushnell 3200 10x40:
Case: Federal Gold Medal
Primer: CCI 200 Large Rifle
Powder: IMR Trail Boss
Bullet: Sierra 170gr (30-30) bullet .308 dia. #2010
Starting Load: 9.0gr (980 fps average)
Work Up: loaded to 9.8 (1017 fps average)
FN SPR
1in12 twist
20"
9.6gr Trailboss
FGMM 210M primer
FGMM Brass
170 gr Hornady RNSP (.30-30 bullet)
Pete
A 5 minute search on Google gives me this data for Trail Boss in a 308.For the life of me I can't understand why people post the stuff they post when it only takes 5 minutes to set the record straight.
Waterboy
P.S. None of the data posted is mine or anyone I know of.
Case: LC90
Powder: TrailBoss 9.6
Bullet: 180 RN Hornady
Primer: CCI 250
Loaded with Lee Deluxe Dies, Powder dropped using a lee perfect powder measure only weighed 1st and last round (50 total).
Here’s a pic of the target at 200yrds. I think it works…
308 Loads
16" Krieger 1/10
220 Hornady RNSP
10.7 gr of Trail boss
1040 fps
mag primers, win cases
3/4-1" groups at 100
not temp sensitive or powder position sensitive
slightly louder than loads with Green dot or other pistol powders, but more reliable. Add water and it's super quiet
200 gr Lapua Subsonic, 10.0 gr Trail Boss, WLRM, 2.20" O2H
967 fps @ 70F
Come-ups
100 yds, 4.2 mil
200 yds, 9.2 mil
280 yds, 14.2 mil
1. AWS, 16" 1/9",w/Sound Tech 20" Integral AWS Suppressor installed, AI 30mm/28MOA scope mount w/ Leupold MK4 4.5-14x50mm:
Case: Federal Gold Medal
Primer: CCI 200 Large Rifle
Powder: IMR Trail Boss
Bullet: Lapua 200gr. Sub-Sonic B416
Starting Load: 9.6gr (985 fps average)
Work Up: loaded to 10.2 (1032 fps average)
Remington M700, 16" 1/10", War Tech Tensioned Barrel System w/ST Black Star 8" installed, H&S 5R stock and bottom metal, Leupold MK4 1-piece base, Leupold MK4 1" Medium alloy rings, Bushnell 3200 10x40:
Case: Federal Gold Medal
Primer: CCI 200 Large Rifle
Powder: IMR Trail Boss
Bullet: Sierra 170gr (30-30) bullet .308 dia. #2010
Starting Load: 9.0gr (980 fps average)
Work Up: loaded to 9.8 (1017 fps average)
FN SPR
1in12 twist
20"
9.6gr Trailboss
FGMM 210M primer
FGMM Brass
170 gr Hornady RNSP (.30-30 bullet)
Pete
A 5 minute search on Google gives me this data for Trail Boss in a 308.For the life of me I can't understand why people post the stuff they post when it only takes 5 minutes to set the record straight.
Waterboy
P.S. None of the data posted is mine or anyone I know of.