@greyhoundollie , the hole in the center of the baffle is 9.5mm, so allows the 9mm round (9.02mm to be exact) to pass through it without making contact with it. I thus didn't think it necessary to add anything to maintain the twist.
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@greyhoundollie , the hole in the center of the baffle is 9.5mm, so allows the 9mm round (9.02mm to be exact) to pass through it without making contact with it. I thus didn't think it necessary to add anything to maintain the twist.
Thanks @Rattlerjake , but actually I'm from sunny South Africa, where virtually anything goes! :bananadance:
@sossol , I did mention it in the original post, but maybe not clearly.
When any additional weight is added to the front of a firearm barrel, the point of impact changes. This is due to a number of factors that take place within a micro second while the round is travelling down between the baffles. Slight inconsistencies between the baffles, slight microscopic deviations in the movement of the barrel/suppressor or slight play in the mechanism that is needed for free movement will cause a round to wander off course. Normally these inconsistencies are consistent, and the round will consistently wander off course in the same direction.
Firing 5 rounds, I can consistently hit a 50mm (2 inch) circle at 15 meters without the suppressor. As soon as the suppressor is fitted however, the point of impact moves by about 3 inches to the 4 o'clock position. That is where the inconsistencies within the suppressor/barrel setup will lead the round. What I have built into the Nielsen device though, is the ability to change the inconsistencies by rotating the suppressor. Rotating it by one notch in relation to the barrel now moves the point of impact by 2.5 inches to the 6 o'clock position. One more notch of rotation will move it again by maybe 1.5 inches to the 9 o'clock position. I can continue to do this until the barrel/suppressor relationship is such that I am back to firing within my 2 inch circle at 15 meters.
Hope this makes sense.
Wow that is impressive, great work!
Just the added weight on the end of a barrel changing the natural harmonics is enough to change the point of impact and group size. Browning's BOSS system uses that fact in a device to tune the barrel's harmonics to a particular load and reduce the group size for that load.
Nice work. If I had more time I'd send in the Form 1, and the $200 check, and make my own as well. I need a .45 can for my Mac-10. Yes, it is a legally owned full auto subgun.
In my opinion the macs are safer with a suppressor fitted, plus it makes them look even more serious.
My staff sergeant had the mac 11, the fire rate on that was incredible - you blink and you have emptied a mag. Takes a week or two to remove the smile from ones face.