As a general rule, cartridges up to 45-50grains of powder burned (not capacity) are best with a 3 port brake. 4 ports are good from 50 to about 65-70 and 5 ports are the most effective above 70 grains. This doesn't mean you can't run a 3 port on a magnum, but you will lose effectiveness, or it won't reduce as much recoil as a brake with more ports. As you go really small, .750" and smaller, the 4 ports work better on the calibers with powder charges in the 40-50gr range because the port sizes get small enough where they can't vent off enough gases with only 3.
Examples of 3 port calibers are: .308 win, 7-08, 6.5 Creedmoor, .243 win, 22-250, etc
Examples of 4 port calibers are: .25-06, .270 win, 30-06, 6.5 SAUM, 7 SAUM, 7 Rem mag
Examples of 5 port calibers are: 7 RUM, 300 win. mag, 300 RUM, 338 RUM, 338 Lapua, etc.
These are the thread sizes I recommend on barrel sizes in these ranges:
Below .540" is 7/16x28
Between .540 and .630 is 1/2x28 unless you want to turn it flush and then it's .670" and up
Between .630 and .700 is 9/16x24 unless you want to turn it flush and then it's .750 and up
Between .700 and .850 is 5/8x24 unless you want to turn it flush and then it's .800" and up
Over .850" is 3/4x24 unless you want to turn it flush and then it's .950" and up
The 3 ports will be 2.22" long and .670" OD with 1/2x28 threads. They weigh 1.9 oz
The 4 ports are 2.67" long and .670" OD with 1/2x28 threads. They weigh 2.3oz.
The Kimber versions with 7/16x28 threads weigh 2.3oz. Both are 77.00 shipped.
If you look at the picture you can see the difference in a 4 port Lil Beast, 4 port Baby Beast max port 5/8x24, 3 port Baby Beast max port 5/8x24, and Baby Beast 1/2x28 regular port. In testing on a 6.5 Creedmoor there is very little difference in the max port Baby Beast and the Lil Beast brakes. I will get the test video up soon.
The 3 ports are 2.22" long, .750" OD, and are available in 1/2x28, 9/16x24, and 5/8x24. The 9/16x24 and 5/8x24 are no turn brakes and the 5/8x24 are .100" longer then the others. They can be tapered just not turned down. They weigh 2.5 oz and are $72.00 shipped
The 4 ports are 2.67" long, .750" OD, and are available in 1/2x28, 9/16x24, and 5/8x24. The 9/16x24 and 5/8x24 are no turn brakes and the 5/8x24 are .100" longer then the others. They can be tapered just not turned down. They weigh 3.0 oz and are $77.00 shipped
These are only available in 3 ports and were made for AR-10's and RPR rifles. They started out as .825" OD brakes and tapered to .750" but I'm in the process of changing that to .800" OD tapering to .750". The length was 2.22" but it will most likely increase a small amount when I run the newest version. I'm currently out of these and will run more soon when I do the Super Baby Beast brakes.
These are out of stock until I do the Super Baby Beast this spring.
I will offer these in 3 and 4 ports and will be .800" OD.They will have the same port size as the Baby Beast 2 piece brake and be able to be turned to .750" in 1/2x28 and 9/16x24 thread sizes. The 5/8x24 version with have the same port size as the Lil Beast brakes. More details will be posted when they are completed.
These should be done in Feb.
The 3 ports are 2.22" long, .875" OD, and come in 1/2x28, 9/16x24, and 5/8x24. This is the brake I typically recommend for the Tikka CTR, Remington AAC/tactical/varmint, and many of the Savages in non magnum short action calibers. They weigh 3.0 oz and are $72.00 shipped
The 4 ports are 2.67" long, .875" OD, and come in 1/2x28, 9/16x24, and 5/8x24. They weigh 3.5 oz and are 77.00 shipped.
The 5 ports are 3.11" long, .875" OD, and come in 5/8x24, 9/16x24, and 1/2x28. They weigh 3.7 oz and are 82.00 shipped
All of these have about the same max tenon length of .760" to the first port and can be turned as small as .800".
The 3 ports 2.22" long, 1.01" OD, and come in 1/2x28, 5/8x24, 11/16x24, and 3/4x24. They weigh 4.1 oz and they are $72.00 shipped.
The 4 ports are 2.67" long, 1.01" OD, and come in 1/2x28, 5/8x24, 11/16x24, and 3/4x24. They weigh 5.1 oz and are $77.00 shipped.
The 5 ports are 3.11" long, 1.01" OD, and come in 5/8x24, 11/16x24, and 3/4x24. They weigh 5.6 oz and are 82.00 shipped.
I will add M18x1, and M18x1.5 in the future.
I redesigned the 5 ports a bit to give better performance on the smaller magnums like the 300wm and 338 Lapua. If you look at the picture you can see the 3 and 5 ports have smaller ports then the 6 port. The 6 port is geared strickly towards the big boomers like the 375 Cheytac and similar. All of them are 1.235" OD. The 3 ports are 2.35" long, 5 ports are 3.52", and the 6 ports are 3.94". I only have a handful of the 3 ports in 3/4x24 done. I have about 40 blanks for 5/8x24 that I will make after the holidays. They are 87.00 shipped. I have the 5 ports in 5/8x24 and 3/4x24 in stock. They are 110.00 shipped. The 6 ports are only available in 3/4x24 at the moment but I will have 7/8x20 done soon. They are 130.00 shipped.
I will make more of thes the same diameter as my Beast brakes (1.01") to cover all the various sized carbon barrels between .900" and 1.01". That means they can be turned down as small as .900" in 5/8x24 threads. The 3/4x24 version will be a no turn just like my stainless brakes. They can be tapered just not turned completely down. I'll start running the new batch the first week of Jan. 2019 and will have some finished within about a week to 10 days of that. The price will be the same 145.00 shipped for the 4 ports and 155.00 shipped for the 5 ports. This time I will do 3 ports along with the 4 and 5 ports. I will run several hundred when I run them so there is no reason for a waiting list.
I had some blanks so I made the smaller 4 port version first. The rest are still a few months out. These are 1.1" wide and about .873" tall. They weigh 5.1oz and the port height is almost the same as the 4 port Beast. It's actually .025" shorter but .112" wider. In testing they performed basically identical to a 4 port Beast on a 300wm. These are 97.00 and are available in 5/8x24 threads.