Armory Sponsor
Posted: 1/6/2011 1:35:24 PM EDT
|
what diameter is the bore of a supressor need to be in relationship to bore of firearm in order to avoid baffle stikes? Is there a good formula for calculating this ratio? Do you want to be as close to bore diameter as possible or is it better to be significantly oversized? Does the bore size through the suppressor have an effect on acururacy, or decible reduction?
Thanks C |
|
I'm not an expert, but I've done some research on the subject.
From what I understand, as long as the bore of the suppressor and bore of the rifle are concentric, it won't effect accuracy. A tighter bore will increase dB reduction, but you will run the risk of baffle strikes if your threads aren't perfect. AAC uses a 0.275" blast baffle bore and 0.300" end cap bore on the M4-2000. It's regarded as one of the quietest cans on the market. YHM uses a 0.241" blast baffle bore and a 0.296" end cap bore on the 5.56 Phantom. While the bore is tighter, it's louder by a few dB than the AAC. I've read that 0.265" is a good bore diameter for a .223 suppressor, so..... .265/.223 = Ratio = 1.188 1.188 x (caliber) = suppressor bore None of this is scientific, just an interesting theory. |
| Years ago I made a form 1 .22lr suppressor. I made the baffle holes about .225-.227...after all, a .22lr is .223", so the bullet should slip through just fine I thought. As the suppressor would heat up, I would start hearing bullets "whizzing" and missing the target. I called AWC (I was already a 77/22 AWC suppressor owner). Lynn McWilliams said my holes were too small, and he suggested something along the lines of make them .25" or a bit larger (I don't remember the exact size, but .25" is about it). Lynn also added that the larger holes wouldn't make it noisier. Result: no more "whizzing" off target bullets and I could tell no difference in the noise level The point being that the holes can be a bit larger than you think and will help ensure no baffle strikes as the suppressor moves slightly as it is heated up. |
Armory Sponsor