When I need the assistance of the sharpened end of a pencil to effortlessly guide and press it in, then the amount is about right. How much Dacron to use is hard to answer, but when you think you have too little, half it ! I found that if I can get it in the mouth of the case with my fingers, it’s probably too little. Pull out a tuft of Dacron and compress and roll it between your dry fingers. Use 8.00 grains, that’s EIGHT grains MP200 powder.ĥ. Drill and enlarge all the Primer Flash holes to a 3.00 mmĤ. I also filled the ammo box, so that at a glance I can see if one is missing etc.Ģ. I used a permanent Black Marker on the bases of all the selected cases and I made a point of putting them in their own, well-Marked Ammo holder (See Photo). Please note that you will not be able to use these cases for “normal rounds again” Mark them as to not confuse them with Normal brass. Select the no of cases you intend using for your sub sonic loads. When selecting a bullet, bear in mind that your velocity is a fixed entity, so you may as well go for a bullet on the heavier side, as this will ensure more energy than a lighter bullet and will in most cases stabilise better at these low velocities.ġ. Do not be tempted to get more than one bag, as one is plenty. It comes in a small plastic bag and is inexpensive. Dacron, no one seems to know what this is, so go to your local pet store and ask for the “fluffy white stuff” to use in your fish tank filter. 30 cal 170 grain Flat Nose, Flat base bullet (As used in Tube fed, Lever actions) I tried some Sierra pro Hunter 180 gr (Flat Base) and some Gamekings (boat tail) Bullets, but accuracy was awful out of my rifle.Ħ. Winchester Large Rifle Primers (I do not use Magnum Primers)ĥ. 308 Win Brass (Spare PMP Brass is what I had)(Neck sizing will work just fine too)Ģ. So I strived for a constant, reliable speed that will reliably go sub sonic, as just one round that goes supersonic, will defeat the entire exercise.ġ. In layman’s terms the speed of sound is around 1116 Feet per second. This is not to say your results will be the same as there are just too many variables.īut this may act as a guideline, for someone wanting to try the same. Savage, 26 inch barrel with a 1/10 Twist What follows worked for me, and if done correctly is very safe in my rifle.
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