.308 subsonic load

UlicniTrkac · February 6, 2014, 06:48 PM

Hello

I am doing some subsonic loads for my 308. Its 1 in 8 twist, and it should be stable with 220 grain lead bullet, that I made with 300 Blackout Lee mold.

I have read almost everywhere that Trail Boss is the powder I should use, but currently only IMR 4320 is available for me.

Any thoughts on starting load with this powder?

Thanks in advance

Sharkbite · February 6, 2014, 10:17 PM

Hey Brother

Im just starting to load sub's in 308. Everyone ive talked to has said dont bother with anything other then Trailboss

I finally got ahold of a cpl cans today and loaded some 175's with it. I TOTALLY understand the recommendations now. Trailboss just about fills the case with 11.5 gns. I mean its REAL bulky

Ive talked to a ammo manufacture he says other powders MAY work but Trailboss is the answer

Jimro · February 7, 2014, 12:41 AM

Red Dot is pretty bulky too, if you happen to have some laying about.

Jimro

Mule · February 11, 2014, 09:43 PM

The new Vhit powder, Tin Star, might work as well as Trail Boss. Tin Star, like Trail Boss, is intended for the Cowboy Action games.

I haven't seen any on the shelves around here.

UlicniTrkac · February 21, 2014, 01:24 PM

I got some shotgun powder to try (name is unknown, nor there are loading data online, only what I had for shot shells).
I put 10gn of it, and got a 225 m/s on my Chrony.
With 12 grain, it read 410 m/s.
I haven't observed any deformation on the brass, but one out of 7 primers went a bit out (not the 12 gn one), and cases I used are some military brass with berdan primers in them.
Tomorrow, I shall load with 10,1 10,2 10,3 gn etc and use proper Winchester primers to try.
For the bulkiness, with 17 gn of it its a case full, with 10 its about 60% case full.

AlaskaMike · February 21, 2014, 01:55 PM

It's probably worth asking what type of rifle you'll be shooting these loads in. If it's a bolt action, the faster powders mentioned will work fine, however if it's a gas operated semi auto and you want the load to work the action, then the faster powders won't do the job.

I know that some think that shooting cast bullets in a gas operated semi auto is a foolish idea, and it's not my intention to open a big can of worms, but I thought it was worthwhile to ask the question--what kind of rifle?

Mike

UlicniTrkac · February 22, 2014, 07:53 AM

Bolt action mauser preped for subsonics

jmorris · February 22, 2014, 09:19 AM

I use 10 grains of TB with my cast 150's. With SS rounds remember to start high and work your way down.

February 6, 2014, 06:48 PM	#1
UlicniTrkac Member Join Date: September 13, 2013 Location: Balkans Posts: 18	.308 subsonic load Hello I am doing some subsonic loads for my 308. Its 1 in 8 twist, and it should be stable with 220 grain lead bullet, that I made with 300 Blackout Lee mold. I have read almost everywhere that Trail Boss is the powder I should use, but currently only IMR 4320 is available for me. Any thoughts on starting load with this powder? Thanks in advance __________________ Benjamin Discovery.22,MRod trigger,Altaros Regulator; BSA Scorpion Carbine .177,Altaros regulator; Daystate Air Ranger .177; BSA R10 .177; Hatsan Hercules .357; Yugo M48 8x57; Suhl 127 12 gauge

February 7, 2014, 12:41 AM	#3
Jimro Senior Member Join Date: October 18, 2006 Posts: 7,097	Red Dot is pretty bulky too, if you happen to have some laying about. Jimro __________________ Machine guns are awesome until you have to carry one.

February 11, 2014, 09:43 PM	#4
Mule Member Join Date: October 16, 2002 Location: Franklin County Missouri Posts: 84	The new Vhit powder, Tin Star, might work as well as Trail Boss. Tin Star, like Trail Boss, is intended for the Cowboy Action games. I haven't seen any on the shelves around here. __________________ Shoot Safe! Shoot Often!

February 21, 2014, 01:24 PM	#5
UlicniTrkac Member Join Date: September 13, 2013 Location: Balkans Posts: 18	I got some shotgun powder to try (name is unknown, nor there are loading data online, only what I had for shot shells). I put 10gn of it, and got a 225 m/s on my Chrony. With 12 grain, it read 410 m/s. I haven't observed any deformation on the brass, but one out of 7 primers went a bit out (not the 12 gn one), and cases I used are some military brass with berdan primers in them. Tomorrow, I shall load with 10,1 10,2 10,3 gn etc and use proper Winchester primers to try. For the bulkiness, with 17 gn of it its a case full, with 10 its about 60% case full. __________________ Benjamin Discovery.22,MRod trigger,Altaros Regulator; BSA Scorpion Carbine .177,Altaros regulator; Daystate Air Ranger .177; BSA R10 .177; Hatsan Hercules .357; Yugo M48 8x57; Suhl 127 12 gauge

February 22, 2014, 07:53 AM	#7
UlicniTrkac Member Join Date: September 13, 2013 Location: Balkans Posts: 18	Bolt action mauser preped for subsonics __________________ Benjamin Discovery.22,MRod trigger,Altaros Regulator; BSA Scorpion Carbine .177,Altaros regulator; Daystate Air Ranger .177; BSA R10 .177; Hatsan Hercules .357; Yugo M48 8x57; Suhl 127 12 gauge

February 6, 2014, 10:17 PM	#2
Sharkbite Senior Member Join Date: November 4, 2013 Location: Western slope of Colorado Posts: 3,679	Hey Brother Im just starting to load sub's in 308. Everyone ive talked to has said dont bother with anything other then Trailboss I finally got ahold of a cpl cans today and loaded some 175's with it. I TOTALLY understand the recommendations now. Trailboss just about fills the case with 11.5 gns. I mean its REAL bulky Ive talked to a ammo manufacture he says other powders MAY work but Trailboss is the answer

February 21, 2014, 01:55 PM	#6
AlaskaMike Senior Member Join Date: September 26, 2005 Posts: 941	It's probably worth asking what type of rifle you'll be shooting these loads in. If it's a bolt action, the faster powders mentioned will work fine, however if it's a gas operated semi auto and you want the load to work the action, then the faster powders won't do the job. I know that some think that shooting cast bullets in a gas operated semi auto is a foolish idea, and it's not my intention to open a big can of worms, but I thought it was worthwhile to ask the question--what kind of rifle? Mike

February 22, 2014, 09:19 AM	#8
jmorris Senior Member Join Date: November 22, 2006 Posts: 3,077	I use 10 grains of TB with my cast 150's. With SS rounds remember to start high and work your way down.