I hate to rain on everyones parade, but this thread is total bulls**t. A rudimentary understanding of phsics tell us that a muzzle break does not affect recoil. Every action has an equal and opposite reaction. So this means that when your 300Gr slug (or whatever) moves forward with force, the sam eforce is being applied to you as recoil. The only difference is due to the mass of the gun and the design of the buttstock, the recoil (equal but opposite) is being distributed over a longer time, over a wider area so it is manageable.
Putting a muzzle break can only vent gas in another direction. Instead of comming out of the muzzle and coming out as a cone of hot gas, it may come out facing only the sides. My understanding of muzzle breaks was that they are for snipers who don't want to kick up too much dist when shooting from prone position as it would give away their position. Thus muzzle breaks venting to the sides and top with prevent the dust cloud of a normal muzzle. Also They can protect the crown of the muzzle from damage which effects accuracy. One fully known side effects of muzzle breaks is actually a negative. The redirection of hot gasses away from the front reflects the sound of the gunshot more towards the shooter. It is a great way to waste a couple of bucks and blow your hearing at the same time.
Really think about it, the recoil impulse is generated way before the slug ever reaches the muzzle, by then the recoil has started to move the gun back into the shoulder of the shooter. No device is going to re-write physics.
Breacher's muzzle breaks serve some purpose, that they help you hold the barrel exactly where you want it to be for breaching.
A good muzzle break design (most are not imho) also have the ability to reduce muzzle ise, but only if they direct the gas upwards only. But even here, most of the recoil that would cause a muzzle to rise has already been generated and transmitted to the gun, before the shot has cleared the muzzle, so it is limited in its help, but I find it reasonable that it may help some. This could help with follow up shots, but only minimally.
Beach: You are lying through your teeth. Hey I can understand you're trying to offload some junk to some newbies, but there is no need to lie. Some idiot will buy your junk just because it looks cool. Then you don't have to look liek a douche for lying to your buyer about impossible claims.
...... As far as felt recoil I don't believe there is enough gas pressure to make a noticeable difference in felt recoil. Kind of like how my ported and unported .40 barrels are indistinguishable while the difference between my 9x25 barrels is very noticeable.
