Good 308 Sub load w/ Varget, 4895, or H1000

[donshaw]

Basically as title states, if anyone has some good sub loads worked up for their 308`s, please share.

Also, what kind of performance are you seeing out of them?

Thanks

 

[swamp donkey]

Don't go there !!!

Not with any of those powders anyway, unless you like blowing guns up.
Buy yourself some trailboss, put 10gr under a 175gr Sierra match king. And you should be good to go. But the powders you listed are far too slow


Regards

Pete

 

[supercorndogs]

hodgdon site has 308 sub load data. did you google it. i found this right away. it is a forum where someone shared some quick load data. i would use hodgdon load data though no use causing an unsafe situation because someone told you the wrong thing to do.

Any subsonic reloading data? - KTOG - Kel Tec Owners Group Forum

 

[supercorndogs]

Don't go there !!!

Not with any of those powders anyway, unless you like blowing guns up.
Buy yourself some trailboss, put 10gr under a 175gr Sierra match king. And you should be good to go. But the powders you listed are far too slow


Regards

Pete

why would low charges of those powders blow his gun up. seems like hangfires might occur. half charge of varget or two powders that are way to slow for the 308. there is subsonic reload data at the hodgdon site. they are mostly pistol powders trail boss being a popular one.

 

[swamp donkey]

Good 308 Sub load w/ Varget, 4895, or H1000

why would low charges of those powders blow his gun up. seems like hangfires might occur. half charge of varget or two powders that are way to slow for the 308. there is subsonic reload data at the hodgdon site. they are mostly pistol powders trail boss being a popular one.

Well, if you actually read what you googled then linked, it says in there about the dangers of low charges of slow powders.

For a start, SEE, secondary explosive effect

If you read up any of the trusted and tested sub 308 loads, they use small charges of fast (pistol or shotgun) powders. The problem with this, is double charges are hard to spot, which is why trailboss is great, as it's so bulky. And, very easy to work down to subsonic loads without starting too high.
H4895 can be used for 'reduced' loads of 60% of listed max (less 10% of that load if needed) but no lower, and that is still going to be supersonic.


Regards

Pete

Ps, hodgdon only list a 150gr nos bt sub load, which isn't even subsonic, and by experience, the 150's don't stabilise, where the 175smk will (in a 1-11"twist)

 

[Cornholeo]

Verified 10gr Trailboss under 175SMKs works great but will not cycle bolt. Good luck on finding Trailboss,shit is harder to find than Varget or Bullseye!

 

[LongArm]

what about h110?

 

[supercorndogs]

Well, if you actually read what you googled then linked, it says in there about the dangers of low charges of slow powders.

For a start, SEE, secondary explosive effect

If you read up any of the trusted and tested sub 308 loads, they use small charges of fast (pistol or shotgun) powders. The problem with this, is double charges are hard to spot, which is why trailboss is great, as it's so bulky. And, very easy to work down to subsonic loads without starting too high.
H4895 can be used for 'reduced' loads of 60% of listed max (less 10% of that load if needed) but no lower, and that is still going to be supersonic.


Regards

Pete

Ps, hodgdon only list a 150gr nos bt sub load, which isn't even subsonic, and by experience, the 150's don't stabilise, where the 175smk will (in a 1-11"twist)

just a question no need to get snarky. it does not say anything about the dangers other than there could be some. in the same sentence he said he used accurate 5744 which is a rifle powder. "secondary explosive effect" theoretically can happen with pistol powders in a 308 as well. how would a gun stabilize a heavier bullet better than a light one.


ps hodgdon used to have a bunch of sub sonic load data either they removed it or you cant find it

 

[swamp donkey]

Good 308 Sub load w/ Varget, 4895, or H1000

Yes, see can happen with 'any' light charge, but the chances are massively reduced the faster the powder.
Stability isn't all to do with weight, it's length, normally the heavier the bullet, the longer it is, but, I can honestly say, that the nosler 150gr bt's do not stabilise in a 1-11"" barrel at subsonic speeds, they keyhole at 50 yds, but, for whatever reason, the 175smks are still flying true at 300yds when launched at 1080fps by 10.2gr trailboss in Lapua brass and a CCI lr spark plug, in my rifle.
The Sako factory subsonic ammo uses the 175 smk, and as I'm running a TRG, I looked at trying them, when the limited hodgdon data didn't give useful results.

Sorry if it came across as 'sarky', I've had a migraine for three days now, so can tend to be a bit blunt. Apologies if I offended


Regards

Pete

 

[mrbig]

detonation is what I was always told to call it,,,Trailboss is best in 308 and I use Bluedot in 223

 

[ahhshoot]

Guys what data is there for the 230 gr pills. Seems a waste of time to not use the heaviest pill possible to bring most energy downrange when velocity is limited.

 

[No1]

Since you didn't say what you are shooting them in,

6.0g Bullseye
175g bullet
1050fps
dead quiet through a can, but won't cycle a semi-auto

24.0g IMR 4350
220g bullet
1180 fps
will cycle a semi-auto

 

[No1]

Guys what data is there for the 230 gr pills. Seems a waste of time to not use the heaviest pill possible to bring most energy downrange when velocity is limited.

Start with 20.0g of IMR4350, this should be in the 800-900fps range, if using an auto loader you may have to work up until you get it to cycle properly.

 

[Sethshaun]

I can verify that 175 smk and 178 amax will stabilize in a 1:11 twist 24" barrel with 10 grains of trail boss. I didn't work up a precision load, just wanted to try it. 1.5-1.75" groups at 100 yards and lots of fun.

I have always heard not to use H1000 in reduced loads, but I do not know the science behind it. I always thought that if you used a fast burning powder you are expecting it to almost burn all at once no matter what it's position inside the case.


Sent from my iPad using Tapatalk

 

[donshaw]

So Trailboss seems to be the powder of choice when loading up sub 308 rds with 4350 being right behind it. Are you guys having any issue with gap/space between the powder and bullet when seated into the cartridge? In terms of precision shots.

 

[Joea132]

I liked Bullseye and trailboss. Get a chronograph before you start this project. You'll be glad you did

 

[Dwclifton]

Anybody have any luck shooting subs through a 1-12 twist. I have an older 700 police that came factory 26- 1-12. I know it wont shoot 200-220 gr bullets at all. I was told to use a 170 gr flat base 30-30 style bullet. Does anybody know if yalls 178amax or 175 smks will stablilize. Eventually i will just rebarrel the gun to 1-10