I would always go side-port. Radial brakes are awful. I really like my MBM 2-piece Ti Beast. I'd get something like that in a 1-piece and have it tapered. Consult with the maker of the brake and make sure it can go down that far.
Custom High Tech in Co. Springs Co. makes really good brakes. I have one on a 340 wby. that is .618. This rifle is 6# empty and no scope and kicks less than my 308 Ruger.I'm not used to dealing with this small diameter barrel. Everything else I own is .830+
I appreciate all the help!
Hawkins makes a three port brake that has back taper and flats on the top and bottom it's .750 diameter. I order them all the time. Waiting on them to make another batch of them Currently I have one that's .875 diameter but the .750 will back taper easily to .650 without issue. I use them on tikkas and other factory barrels that guys want recoil reduction.
APA Micro Bastard x 2The Answer (Gen 3 Micro Bastard)*
At APA we are known for solving big recoil problems, not small ones. For years competitive shooters have asked us to develop a brake for the off-hand, run-and-gun, "Gas Gun" competitor. We found this little recoil problem was a little more dynamic than anticipated. We wanted to give these...www.americanprecisionarms.com