Posted by MarkB_MI on October 02, 2013 at 02:46:42 from (75.198.40.168):
In Reply to: Finally got one!! posted by Goose on October 01, 2013 at 20:41:12:
Some guys did velocity testing with different barrel lengths for different cartridges by cutting a barrel down one inch at a time. Here's a link to their results for .45 ACP. In most bullet weights, going from 5 to 16 inches should get another 100 feet per second, which is significant for .45 ACP, which runs 1000 to 1100 fps for most loads. On the other hand, the normally subsonic .45 bullet will be pushed supersonic, so it will probably be quite a bit louder coming out of a longer barrel. Note that muzzle velocity actually drops going from 16 to 17 inches.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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