by BD1 » Fri Oct 15, 2010 8:00 pm
You are correct. With any gas check boolit design I get absolutely no leading at all. I once purposely went 250 rounds of cast without cleaning just to look at this issue. If I shoot 25 or 30 plain based boolits, (no gas check), I'll see a little lead in the carbon build up on the bolt. Still really not an issue, but there none the less. In my experience there is never any build up in the gas tube or key. Whatever is vaporized seems to stay vaporized until it condenses on the bolt along with the carbon fouling.
If I can sort out the accuracy issue, my next research will be toward the .45 Slow, (sorry for the cheap pun on the name), a barrel with two gas ports, one large and close for 400 grainers at 1,050 fps, and one "as issued" for 300 grainers at 2,200 fps. My real interest is in the design of the heavy low velocity boolit in an effort to keep MOA accuracy out to 300 yards. My theory being that a 400 grain .45 LFN even as slow as 500 fps will still kill anything on earth if placed correctly. If you're sitting around without much on your mind some afternoon you might think up a "quick change" external mechanism to switch between the ports to eliminate the need to remove the hand guard and swap out the gas tube. I have a thought on this, but I'd only whisper it at this point.
BD