My suppressed 22” 7mm rem mag was doing 3035fps with a 162 Amax and H1000. I now run the 180eld-m @ 2917fps with RL-26. Hand loads but more than capable to 600.
Insulation tape over the barrel or muzzle brake and load a fired case in the chamber to seal the chamber end of the barrel. When you find game simply cycle the action and your in business with a dry chamber and barrel. Even in the heaviest down pours this method works well.