The last two were made by
Answer . The Answer brake has three chambers whereas the others have only one. And believe me,
IT WORKED! It made a 7.5 lb .375 H&H recoil like a .30-06. I am not particularly sensitive to recoil, so I abondoned the concept of a brake. But at least I'm openminded enough to give a fair assessment.
But in answer to your question, I believe that the
ANSWER system is the best and most effective.
Grasshopper