Another research project. Approach these loads with caution as you would any off the net loading data.
These loads may seem low power to us but they are very close to many black power and muzzleloader that brought a lot of game
in their time. They are also super economical as to powder used if you have a mold, lead and primers.
Slow: reduced loads
1. .308 Winchester
a. 26 inch barrel with a 220 grain NEI .308 cast bullet over 3 grains of
Clays is almost silent
b. 24 inch barrel with a 150 grain RCBS bullet, 3 and ½ grains was needed and it was like a loud
c. 150gr cast bullet* load 13 grs. of Red Dot in .308 or .30-06 at about 1600 fps
d. 170gr, cast bullet* 13
grs. of Red Dot in .308 or .30-06, about 1500 fps
e. 200gr. cast bullet* 13 grs. of Red Dot in .308 or .30-06, about 1450
f. play with powder levels of Bullseye or Clays for silent loads...but you are not going to get there with 180 grain
cast slugs and under.
g. 170 thru 190 grain cast slugs
i. 5 grains of WW231 or HP38 will go around 1000 fps
8 grains of Unique goes 1250 fps.
iii. 20 grains of 2400 or 18 grains of SR 4759 goes 1800 fps .
iv. * Note: Jacketed
bullet velocities are about 120-150fps less than a lubricated lead bullet of the same weight
2. 3006 Springfield
150gr cast bullet* load 13 grs. of Red Dot in .308 or .30-06 at about 1600 fps
b. 170gr, cast bullet* 13 grs. of Red Dot
in .308 or .30-06, about 1500 fps
c. 200gr. cast bullet* 13 grs. of Red Dot in .308 or .30-06, about 1450 fps
grains cast bullet
i. with 10 grains of Red Dot or Green Dot 12 grains will go 1200 fps (without recoil & very quiet
@ about 700 ft-lbs of muzzle energy) good to 100 to 125 yards for training or small game hunting.
ii. 13 grains of Unique
will go 1500
iii. 28 grains of 4759 will give 2000 fps with over 1800 ft-lbs of muzzle energy
iv. * Note: Lubricated
jacketed bullet velocities are about 120-150fps less than a lubricated lead bullet of the same weight
3. The Buckshot Option
a. 30-caliber rifles loaded with a single 0-Buckshot, .32-inch diameter, 48 gr., round lead ball.
b. 3.0 grains of
Bullseye powder with Dacron of Kapok fiber and then the lead ball.
c. called "the ideal cellar and small-game load," and
is suitable for most of the major .30-caliber rifles (including the .30-’06 Springfield, .308 Winchester, .30-30 Winchester,
.300 Savage, and .30-40 Krag).
4. Rules for subsonic loads:
a. As you lower the bullet weight in any caliber with cast
bullets for quiet loads, you actually need more powder.
i. Bullet weight determines the efficiency of the powder burn.
Barrel length determines the loudness of the report.
b. Drill Flashole* to 3.5mm (9/64") to allow all the primer flash
to enter the case and ignite the powder completely.
c. Use Magnum Primers for maximum primer flash and better powder ignition.
Lube all bullets. Moly is good but animal fat is better.
e. Lubricate the bore regularly while shooting.
f. Never crimp
bullets into cases. Never seat bullets "into the lands."
g. Try not to use powder charges of less than 40% load density.
h. If load density is less than 40%, use tamping or fillers to keep the powder at the bottom of the case.
i. a portion
of tissue paper (big enough to crumple against the case walls for a grip) over the powder to hold it back against the primer.
Make sure the bullet exits the bore after each shot.
j. Use only the fastest burning pistol powders - N310, N312, Bullseye,
Clays, Titewad, HP38, Red Dot.
k. Any sort of slow ignition or hang fire is a warning of imminent Secondary Explosive Effect
l. *Note: safety issue! These cases must marked and never used with full power loads!
5. To prevent jacketed
bullets from sticking
a. In a dirty bore, all conventional jacketed bullets used for subsonic loads must be lubricated.
a. The traditional method: dip the bullets in melted, refined animal fats (lard) which hardens as it cools, leaving a
thin, slick surface on the bullet. (messy and slow).
b. The modern method: moly coated bullets apply to bullets your self
or buy direct from the factory.
c. Caution: jacketed bullets in subsonic loads risk becoming lodged in the bore with less
than 6 grs. of N310, N312, Bullseye, Clays, Titewad, HP38, Red Dot pistol or shotgun powders when loading jacketed bullets.
6. To prevent lead cast bullets from leading:
a. Cast bullets will lead above 1300 fps unless gas-checked.
hard cast bullet, that doesn’t have a gas check, can be used by
i. Cut a small disk of bullet base size from thin
polypropylene and glue it against the base
ii. This stops fouling almost as well as gas checks in sub-loads.
This article was taken from the best forum on the Web that is dealing with preparedness issues.
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