Suppressors are safety equipment.  It's extremely frustrating that states like California don't allow them. I'm using an ace brake with the shield. So far it's the best option I've found for my 6gt prs rifle.

The one on the 25mm bushmaster does.

Suppressors are way cheaper than hearing aids

I'm a physician. Excellent commentary. Your  Pronounciation was impeccable. I just went to my first prs match and one stage was indoors. Everyone seemed to suffer a headache from this.

I am always in the cheering half, because of the care and dedication that goes into all of your videos.

I always thought brain damage caused muzzle brakes

This may be the best, and possibly the most important video you have made. Well done. And since I have recently relocated to a state which allows ownership of suppressors, I will be purchasing one in the near future. Thank you for the info. 👏

Time to throw 50 beowulf downrange from a 5.5” barrel with a muzzle brake😂

Good timing on this as the NFA regulation on Suppressors is unraveling. I have long been frustrated that safety equipment such as suppressors were regulated like that. I'm glad it's finally rolling back and we can look forward to better and more affordable access. That has been the biggest hurdle for a lot of people.

If shooting with a muzzle brake causes acute brain damage, just imagine what shooting with a muzzle break does!😮

Thank you for your work in doing this. As someone who suffers from TBI I’ve had to move to suppressors for teaching and competing. I try to shoot in squads with those who I know are suppressed and highly recommend suppressors in classes. Hearing loss, tinnitus, and headaches are not fun, take care of your head and ears!

I would think the over pressure received by the guy next to you, at the bench, for example, would be worse than that received by the shooter. I've always found the blast is much more egregious when the gas ports are directed away from the guy behind the gun and toward someone beside you, then it is when you are behind it. Just a thought.

I went to an indoor pistol range once. ONCE.

I have permanent hearing and brain damage from 22yrs Service as a Sniper shooting.50cal, .338 and 7.62mm. Definitely recommend using a suppressor if you are legally allowed.

Whether I'm cheering you on, or angrily testing to see if you're wrong(seating depth). I always appreciate the care and effort you put into using the scientific method to support your claims. Thanks for another great video!

I got rocked by my buddys 6XC...was perpendicular to the brake around 3 feet away with muffs and earplugs...got dizzy, nauseous and almost puked, lasted for a couple hours

I know a couple people with permanent neurological damage due to a career of professional shooting. It's quite sad.  The new monitoring protocols will help people, if actually used properly.

Great info Keith. Thanks for taking the time to do the testing and editing.

After 10 years of matches and exposure to blast overpressure I can tell you my health has degraded related to migraines/ sensitivity to change of pressure particularly around my eyes and sinuses.

It’s triggers all sorts of small issues that will sometimes cause major migraines and even physical responses.

I’m unable to use silencers due to my county regulations.

I RO at two day matches at MKM Precision. Most brakes vent to the sides of the shooter but the RO is usually in the direct blast of it due to having to watch the shooter closely for safety reasons and rules I need to follow to run the stage correctly. If you ever do another study you should have a RO wear the sensor to see if the data is the same or worse. Glad you brought to light what most shooters and ROs never really think about.