Honestly, epoxy is the hero here. Get a good marine‑grade resin, mix it on a tiny piece of scrap, let it set, then press that bracket on like a pressure‑fit. The resin fills every microscopic gap, so the mount won’t drift when you bolt it up. A machined metal bracket is solid, but it’s hard to get it perfect and you’ll still have a little play unless you sand it to match the scope shroud perfectly. So, go epoxy, seal it tight, then test it at 500m. If it moves, tweak the resin thickness, not the whole bracket. Good luck and keep that scope steady!