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Posted: 7/22/2017 7:43:21 PM EDT
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I've been reloading 44 for minimum suppressed noise from a 16 inch barrel and have some observations that seem to not make sense.
I've tried two powders extensively with widely varying bullet weights in special and magnum brass. In general, as long as the bullet is subsonic, the noise is often the same regardless of bullet weight or powder charge. I'm comparing what I hear, no fancy meters. I've asked others to give me their opinion standing in various positions and they agree. I can mix up 10 rounds of random loads (same powder, different bullet weights and charges) and shoot them and can't tell a difference in noise. If someone else shoots (so I can't tell difference in recoil) I can't guess which is which. Any ideas why? Anybody else observed this? The two powders I've used are bullseye and imr4227 and I've used 180-300 gr XTP bullets. For example, with bullseye the following loads sound the same: 5.5gr/180gr/spl brass 6.0gr/240gr/mag brass I don't have a chronograph, but there has got to be a large velocity difference in those two loads. Why do they sound the same? With imr4227 I can use 15gr with both 240 and 300gr bullets and they sound nearly identical even though the recoil difference is significant. I feel like I can tell the 300gr rounds by sound more than guessing should, but I haven't shot them enough to feel confident in that. I've shot over 300 bullseye rounds. Can anybody put these in quickload and see what the muzzle pressures are? Is the 4227 fully burned in 16 inches? I wonder if my silencer works really well and the noise difference is just too small to hear or if it's related to the way the powder is burning(always burned in the barrel, causing muzzle pressure to not vary much with the powder charge?). Or maybe something else? |
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