need 308 subsonic loads

[browning guy]

Ok, before I stray in to the hinterlands of the interwebs...
Any one have a pet subload for a 308 they want to share.

I have the following bullets to play with
150 gr
155 gr cast
168 gr
175 gr
179 gr
180 gr
220 gr

Out of a 700 with a 20 in barrel and a yhm can.

 

[clandestine]

I hate you, you magnificent bastard.

 

[stu929]

Plucked from snipercentral

175 SMK
Lapua brass
CCI 200 primer
10gr Trailboss

Another
200 grain Lapua sub-sonic projectiles at around 1030 fps but are still fine tuning the Trailboss .... I'm at 10.7grn and that's looking good.

Seen several loads around 7.5-9 but those were gas checked cast bullets.

 

[Speed3]

Be CAREFUL working up a subsonic load...test without your suppressor. If you can't stabilize them, you could destroy your can.

Watch for key holing and once you have a load that shoots well at 100yards shoot through paper or cardboard about 6" from barrel to make sure they are stable from the muzzle all the way out to 100 yards.

Don't waste your match bulets on the subsonic loads... 180gr Sierra flat nose have worked for MANY with zero issue, some sub MOA even at 100 yards.

Im interested In your findings, about to purchase a thunderbeast myself.

 

[clandestine]

Ill also add for those reading who reload.

Avoid pulled projectiles for suppressors. The Jacket can separate and destroy a can.

 

[browning guy]

Ok I have done a little googling but not seeing much on subsonic with cast stuff.

 

[Pinecone]

There is a bulletin on how to use Trail Boss for loads.

You work up the load backwards. Start by filling the case, then reducing the charge until you get the velocity you need.

http://www.imrpowder.com/PDF/Trail-Boss-data.pdf

 

[Franklin]

trailboss is the powder to use but have fun finding it at this moment! it fills the case as much as standard smokeless and allows for no buffer material!

 

[browning guy]

trailboss is the powder to use but have fun finding it at this moment! it fills the case as much as standard smokeless and allows for no buffer material!

Oh I am good on trail boss its what I use in my 45-120 and 45/70
I am working on a 220 gr rn sp with trail boss now as a subload.

 

[Franklin]

Oh I am good on trail boss its what I use in my 45-120 and 45/70
I am working on a 220 gr rn sp with trail boss now as a subload.

can i have some trade you a can of varget

 

[browning guy]

So I have my 220 grs loaded up with 10.5 grs of trail boss I will test this week and get back .