Quote:
|
Originally Posted by too_many_hobbies
I ended up with an AR-15 custom upper with Olympic Arms 16" barrel in 1 to 8 twist that I should have in a couple of weeks. As soon as I measure for correct OAL, I am going to load my subsonic test rounds with 9.2 grains of H110, Federal 205 primers, and Sierra 240 grain Match Kings.
Now, to plan for the next step...
I plan to test fire a few rounds before placing the sound suppressor on the barrel, checking for a stuck bullet each shot. How do I check for stabilization of the 240 grain bullet? Should I perform a specific test before placing the sound suppressor on the barrel to avoid a baffle strike?
|
Actually you'll want to start with more than a specific load for several reasons, starting above the speed of sound and lowering the powder charge until you get to about 1000 fps (under the speed of sound) is safest so that you don't stick a bullet in the barrel -
to test for stability of the bullet put a cardboard box up close 10 -15 feet and at 100 yards - shooting thru them should leave nice round holes in the cardboard - if you have oblong holes your bullet is tipping and unstable.
After your bullet is verified stable then mount your suppressor and look thru the barrel to make sure you don't see any part of the can in the way of the barrel and do the look in the other direction. (if you look thru the can and center the chamber end in the center of the suppressor exit hole, it should all be concentric - circles within circles).