zack is the only place locally that carries limbsavers. Dont get the cheap butler creek knock offs they sucka nd are nothing like the limbsavers. As for a muzzle brake your going to have to send it out to have the barrel threaded and you going to have to find a .300 win mag muzzle brake with a diameter of the tikka barrel. If they exist they are probably going to be very expensive in the around $100-$150 plus i would expect around $80-$100 in sending the barrel out in threading. I would get a limbsaver first and/or a padded shooting jacket. I learned to live with it with my 30-06 remington 700