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H110 in an AR15? Bullet weights?
I've been loading .300 Whisper in an SSK Contender for the past 5 or 6 years. Since I've been using it in a single-shot, I haven't really been concerned with how my loads would run in a gas-operated semi-auto.
I recently bought one of the Noveske .300/221 barrels for an AR15 and put it together last night. The barrel does have a 1:8 twist and the gas port is in the pistol position. Now I'm wondering if any of the loads I have already worked up will run it or not. I'd prefer to use some of the powders I have on hand before buying some different stuff.
I've got some ammo loaded using a 220 gr SMK and H110, that I'm thinking should do okay, although they might be supersonic. They were developed in a 10" barrel and the Noveske is a 16" barrel. I'm sure my AA#2 loads won't run.
What are some other good powders for a gas gun?
Also, I'm thinking of working up a cheap plinking load for this gun. How light can you go on the bullet weight and still get reliable functioning at subsonic velocities? Can you get surplus 147 gr. bullets to cycle? Any other inexpensive bullets to look at? I've got a few hundred 220 SMKs still, but it's nice to shoot on the cheap as well. I had worked up a great subsonic load using a 150 gr. bullet for the .30-30, but I doubt that one would cycle either.
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