Test date 8/21/07 time 8:00 am to 10:30 am
Temp 98-103 Humidity 36%
Sunny and clear Wind 4 knots
Far East Valley out of Phoenix AZ
Cases filled to bottom of neck with Plastic clay and baked at 300 degrees for 20 min to solidify.
Flash hole diameter drilled at 1/8”, 3/16” up from rim.
Powder cavity diameter drilled at 3/16”,
drilled down from neck to need extended flash hole.
Remington 150gr Bullet PSP - moly coated
Each case loaded with 3 gr of Red Dot
(this loaded filled the cavity 7/8” up from bottom of case. filling the case to the bottom of the neck holds 5.7gr of Red Dot with bullet seated you have room for 4.7 grains of Red Dot)
Case—Remington with primer hole drilled out.
Each of 7 rounds weighed in grains loaded, velocity in FPS, FAL with or without can, overall length
#-Weight..Feet Per second...Suppressed....OAL
1-372.4....486.6...................yes................2.705
2-374.0...605.1....................no.................2.700
3-372.6...525.8...................yes................2.700
4-370.8...438.6...................no..................2.700
5-374.1...573.2...................no..................2.702
6-371.6...372.1..................no...................2.699
7-374.0...511.3..................no...................2.695
Needless to say I'll be upping the charge to see if it improves the consistancy of velocity and trying to get closer to 1000 fps.
308 subsonic Experiment #8
308 subsonic Experiment #8
Last edited by Artful on Thu Aug 23, 2007 11:59 pm, edited 1 time in total.
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