308 subsonic

[Artful]

David Saylors of Liberty Suppressors made an experimental CNC machined 308 reduced capacity case.

Here is the youtube of the David shooting the suppressed rounds.... 10 grains of TrailBoss

http://www.youtube.com/watch?v=KnrK9qC2VUc







David was nice enough to send me the cases for a test.

Nice fall day in Arizona about 70 degrees - not much breeze.

Decided to test with some nice 147 FMJ BT with Cannalure .308 and TRAILBOSS powder out my FAL set to single shot Grenade setting on the gas position. This is the same Rifle as used with Cyclone on previous tests.

As there are only these 3 orginal cases I decided to take my reloading to the field so purchased some little glass vials to preload with measured bits of TRAILBOSS powder.

I had found the factory RCBS and Redding neck sizer worked the brass too much so am using Lee Collet neck sizer die.

As David had already tried 10 grains with his loading and it filled the case to capacity and was a compressed loading. I discovered that 8.5 grains was to the base of the bullet and started there.

Used CCI 250 magnum primers
Velocity figures
1160 - 1009 - 1128
Target 1

These are all shot around 50 yards

Next loaded same cases with 8.0 TrailBoss same CCI 250 primers
1001- 1176 - 1174
Target 2



Next loading 7.5 grains TrailBoss same CCI 250 primers
990 - 1102 - 1079

Tried it again with 7.5 grain TrailBoss same CCI 250 primers
1089 - 1073 - 1055
Target 3


Took my last premeasured 7.5 grain TrailBoss but used CCI 300 Large Pistol primers
1089 - 1031 - 1056
Target 4

Yep, three bullets into 2 holes with a called flyer
- I will exlore this load more later... :D

Had my next loading of 7.0 grains of Trail boss CCI 300 primers
957.6 - 1040 - 1032

Reloaded again all the same
980.4 - 910.6 - 1006

Took my last three 7.0 grain premeasured and change to CCI 250 Large Rilfe magnums 1030 - 1001- 1010
Yes I will try some more of this load as well. :D
Target 5


This was the 9th loading of these brass cases - no neck splits or other problems notices with the cases at this time.

On thing that was noticed, was there enough gas blow around on the cases caused me to have to clean the chamber (dry brush) on the FAL or it would fail to go all the way into battery until cleaned.

So it was taken to cleaning after every 3rd shot just to keep from having problems and as there are only 3 cases it was a natural break in the action to do it.

VERY PLEASED with these cases so far.

[Artful]

Yesterday 10/31/2008 (Happy Halloween) went out in the morning
to try reloading the same 3 Liberty Suppressor Reduced Capaity Cases
This will be the 10th thru the 17th reloading - still no signs of wear using the Lee Neck Sizing Collet die.

All shot at 50 yards

7.1 one grains of Trailboss over cci 350 magum primer with 147 grn BT FMG Velocity (first shot cold bore)
Velocity 845.4 - 1025 - 894.6
Session 2 Target 1


Reload with the same load as above
Velocity 991.5 - 890.3 - 772.9


not happy with the velocity jumped up the powder charge
7.4 grains of Trailboss with CCI 350 magnum primer with 147 BT FMG
Velocity 897.7 - 957.5 - 1055


Bumped it another tenth of a grain to 7.5 grains
Velocity 987.5 - 1103 - 1021


Bumped it again 7.6 grain TrailBoss with same 147 grain FMG BT
Velocity 1054 - 1065 -1042


Once more with 7.6 grains Trailboss and 147 gr FMG BT
Velocity 1014 - 1098 - 820.4


Then decided to try 170 RN Remington SPCL over 7.6 grains of TRAILBOSS - thinking heavier bullet would slow down a little but may make the velocity a little steadier - WRONG
Velocity 499.6 - 703.6 - 360.9

Note only one of three bullets fired reach the target paper!

As Jerry my Shooting partner pointed out
- last time we had run an oily snake between sessions and this time I hadn't.
The 30-30 bullets had more than triple the amount of bearing surface.

Let that be a lesson to me.

And remember to start high and work down with subsonic loading.

Until the next test

[youssefa]

____________________

[Artful]

Originally Posted by youssefa

____________________

Sorry I didn't get back in time for your question. would you care to repeat it?

[22-250Rino]

Hey there new to this site but thought I would throw this out there. The load I just finished for My savage LE1 seems to be one of the better ones I've seen.

130gr speer HP
6gr. titegroup
C.O.L. 2.64
3 shot string of 1067,1067,1082
3shot group .175 c to c at 50yd

[Artful]

Originally Posted by 22-250Rino

Hey there new to this site but thought I would throw this out there. The load I just finished for My savage LE1 seems to be one of the better ones I've seen.

130gr speer HP
6gr. titegroup
C.O.L. 2.64
3 shot string of 1067,1067,1082
3shot group .175 c to c at 50yd

looks like it's very consistant

[clay_breaker]

Is David going to make a run the reduced cap brass? I went to their website
and it is out.

[Artful]

Originally Posted by clay_breaker

Is David going to make a run the reduced cap brass? I went to their website
and it is out.

I got 20 from him a month or more ago @ $4 each - he said he had an offer to buy the CNC program and materials from another company so he may have sold the project to them. I'd give a call and talk to him about it.

[xat130]

Bumping this thread.

New to QB but not shooting and reloading.

Awesome info in this thread and forum. Any updates would be great!

Thanks!

[Artful]

What kind of update you looking for?

I'm still happy with the reduced brass cases I got from Liberty.

The original cases still going strong - was able to shoot uphill, downhill, from sling or loaded into ejection port without noticable change in velocity. Trailboss is filling up the cases nicely. Only issue is gas flow around the cases upon firing but just clean after every fifth firing and good to go.