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[ARCHIVED THREAD] - 6.8 Sub Loads (Page 1 of 2)
Posted: 9/26/2007 10:39:25 AM EDT
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So I'm working on doin some sub loads so I can shoot at my property at any pest(ie. extra barn cats I don't like or squirrels) Well I've tried 3 different so far Powder: red dot bullet: speer 100 grain sp Primer: Standard CCI large rifle primer(people say use magnums but I don't have any right now) I've done 5, 4, and 3 grain loads so far and I'm using 2 grains polyester pillow filling to keep the powder compressed in the shell So far results are louder than I like which means they probably aren't sub, but they aren't so loud that I need hearing protection. I'm gunna lube up my barrel and the bullet on my next batch and try some 1.5 grain loads |
When you get a load that works best, take a camera and get some group shots, ! |
No cycles, which I don't mind. I'm gunna try to experiment with a few other powders, I'm just now delving into the sub loads so I started with recommendations and branching out. Who knows I might find a powder that'll cycle and be a sub load, but I doubt it |
What book????? Never seen anything posted in any books about sub loading, but then again I only have 4 different loading manuals and they are all old |
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For the bolt to cycle with sub loads you have to run a slow powder so the pressure is still up when the bullet gets to the gas port. I'm shooting 3 loads through the chrono. tomorrow I'll let you know. Update. I finally found a use for a model 1 16" carbine gas barrel with 10" twist! SUB LOWDZ 130gr Sierra SBT, SSA small primer cases RE7 11.7gr =1200 fps try 11.6 748 16.3gr=1250fps try 16.1 RE19 20gr=1040fps try 20.5 They all cycle the action!!! |
Wow  Do you think that Unique would work? I know it is very slow, too, and I am using that right now for my .308 SS loads. I just made up some for my bolt gun and they are just stupid-quiet! The .308 load: 9.5 grains Unique, in Lake City brass, w/ 180gr Sierra Match King-Moly coated to assure they clear the barrel. My gun has a Mike Rock 5R barrel with 1-10 twist. Sounds like a pellet gun....if not less. And....I have one of those "high-pressure" barrels of which you speak.... I now have a use for it!!! |
How does 4350 compare on those?? |
sorry|
I didn't have to use Moly, but my rifle and can are new, so I didn't want to take any chances. Also, that way, I could go as low as 8.5 grains. At that powder charge, all you hear is the firing pin, a little whizzing sound and the SLAP of the bullet hitting. YOWZA  |
LOL the little piggies never know what hit 'em. Thats gotta be cool out of a bolt gun, What I get is puft, chek, sproing, chek, whack. With my 223 the P dogs turn into a red vapor but, with the SS 200gr 30cal and can it looks like something invisible tackled them. PS try 18-19gr 4895 and 190-200gr bullets in the 308. |
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If you use the heaver projectiles, like 130 grains, then 1 in 10 should be fine. However, you will be limited to the loads that you can shoot in terms of velocity on the supersonic end. 130s work great for subs because they are so heavy for the cartridge. Most of our experience with the cartridge has been with grain weights between 90 and 115 grains. Either 1 in 10 or 1 in 11 will stabilize those, but you can get more velocity with less pressure out of the 1 in 11, when loading for velocity. I doubt that you plan to shoot only subsonics out of this gun, right? We were talking about using the Model 1 barrels for subs, because they are 1 in 9.5" twist, will stabilize 130 grains, and with the higher pressures this barrel tends to generate, it appears that the action may cycle with the loads Constructor listed above. Hope this helps.... |
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I'd do the 6.8. It's not a wildcat you don't have to form anything. My 11 twist shoots the same 130gr sierras at 2500 easy out of an 18" tube. IMO the 6.8 is a great do everything round in a AR15. CQB, 3 gun, hunt, Sub loads and with 90 gr TNTs it's even flatter shooting than a 308 out to 5 or 600yds. |
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i hear that the model-1 barrels are e.r shaw.. i believe that these are good. will the 9.5 twist stabilize the lighter bullets as well as the heavy, or is it better to go with a 1/10? i would like to shoot subd, but i dont realy know the first thing about them. i would like to learn thoug. and, up hear in crap-happy illlinois, i cant use a can. how do these sub rounds do without a can? (sound wise) thanks so much guys, brian |
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A 9.5 will stabilize anything but the fast twist causes high pressure so you can't load as hot as you can with a 11 or 12" twist barrel. A sub-load is less than 1150fps but it's not quite at all. Well, ones that cycle the action aren't quite. I think Hi-tech Rancher is shooting a pistol or shotgun powder so it may be quite. |
I'm using a shotgun powder but I"m gunna try to use some 4350 so I can use less filler. I don't have a can yet so I gotta load my stuff really low. I'm not entirely comfortable with using 2 grains or even 1 grain of powder so I wanna find something a bit slower burning. Hence the use of 4350 |
| where can one get a book that explains all the practices and procedures to loading and shooting sub-sonic ammunition. i have done a little searching around the interent, but i am just sceptical about info i read on the internet that may pose safty issues that can end my life.... ya know what i mean? brian |
Do a few google searches and read some of the articles. Information that is repeated between different links is accurate; remember to err on the side of safety. The first sub load I shot, I loaded the bullet, pointed the muzzle in a safe direction and shot with the gun as far away from my body and face as I could. Sounds stupid I know, but in my past I've had a lot of close calls with stuff that didn't explode, but could still mame you. Start with loads that you are told specifically that work and then work with that load to the point you want it to perform. If you need fillers I've been told cotton and polyester pillow filling work(I use pillow filling), I'm told corn cob media and cream of wheat work too, but I haven't tried them. One thing in closing, read at least 8 different sources/opinions before trying hands on |
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This might be a good place to frame the question: I understand that fillers may be required to prevent pressures from building to rapidly due to the air void left in the cartridge? Can anyone give me a scientific/technical explanation about why this phenomenon occurs? I imagine it's due to the extra surface area of powder exposed to the primer detonation but thats conjecture on my part. SMEs? |
Will have to try some of the sub loads, Thanks for the info.
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Think about it in terms of surface area. Typically a shell is full of powder, so it burns uniformly from the primer to bullet. While this is happening the expanding gases are pushing the bullet down the barrel. Well if you have very little powder in the shell, the exposed surface area of the powder is much greater than a full shell. This can cause an excess in pressure in the shell and possibly do damage to the gun or you depending on how much charge is used. THe filler keeps the powder packed to burn uniformly |
I'm going to add these to the Reloading Recipies list. Thanks! |
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Are you looking for the PUA(no noise) and don't care about cycling. or do you want it to cycle too? Most bullets require a start pressure of 3000psi+ -. Thats why your pistol powders are having a hard time coming out of the barrel. 16gr 4350 should get you close to 1200fps and should cycle. #9 is popular for sub loads and 7.5 gr should be close to 1200 it should be quite and should cycle but, you will need a filler. #9 is the fastest powder the program list as workable. |
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have any of you guys tried IMR Trail Boss for loading sub-sonic? i read an article on it not too long ago about using it for reduced velocity plinker loads with cast bullets in rifles. it didn't look like it would take too much more tinkering to work up sub-sonics with other calibers. I'd have to go back and check the atricle to see what powder it had a similar burn rate to. constructor: does quick load have Trail Boss in it? if it does could you run 80% fill (or so) of Trail Boss in the 30 HRT pushing the Lapua 200gr sub-sonic bullet out of a 10.5" barrel? i've been intending to purchase it, but haven't gotten around to it yet. advntrjnky |
I have the latest version 3.3 and that powder is not on it. If we could find it on a burn rate chart I'm sure we could get close. |
I could care less if the action cycles. I'm looking for very low sound. I wanna shoot squirrels without letting the world know I"m shooting squirrels. I think I just need to buy the tax stamp and build the can I have the BP's for |
good idea. or a cheap 22 |
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the article says that for most pistol cartridges it is similar (same charge weights) to Hogdon's Titegroup. it doesn't get anymore specific than that. however, the the best thing is that it has twice the volume for the same charge weight. it did give a load for the 30-30 of 6.5 gr pushing a 165 gr at 975 fps and 7.0 gr at 1089 fps. i think i'll have to pick some up for testing....and Quick Load also. I'm still waiting on my barrel (30HRT) from Teppo Jutsu, and all this talk about loading the 6.8 sub-sonic has me chomping at the bit. advntrjnky |
Yeah I'm missing something too |
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pets are protected......wild feral pests are not. learn the difference. no apology will make better what you said. you said it (typed actually), you meant it. why appologize for something you mean? i consider your apology hollow/empty/ worthless. you also put a very informative thread in the toilet. advntrjnky |
Back to our regularly scheduled program I am getting ready to load up some speer 150 grn sp with RE19 based on constructors data. Anybody care to speculate on a start load. I don't want to screw up my rifle or my can or my melon. P.S. I am not telling what I intend to shoot with my quiet loads 
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[ARCHIVED THREAD] - 6.8 Sub Loads (Page 1 of 2)
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