Here's my take in general with big bores. They have to have a quality barrel with a smooth uniform rifling that doesn't accumulate huge amounts of lead in a few shots. Also.the lead needs to be smooth and uniform. Meaning throating reamer sharp and properly lubicrated. Chicken thief received a Zeus with the most terrible lead I'd ever seen. Next with the .510 you are still limited to light 250 grain slugs shooting untethered even at 50 yards. Too much fps variation with heavy slugs for accuracy at say 100 yards. Aea makes there own barrels...quality?? My Texan .510 would group terribly if I didn't tether it to external regulator. My factory Texan .510 Lother Wather barrel was terrible. I had to aggressively hand lap with lead laps for hours before I got a smooth uniform surface on rifling and removed tight spots.from the bore. Now it is accurate and cleans up like a dream. Western Bush bucks seem to consistently shoot decent, due to just a decent normal barrel probably green mountain. I think Chinese have a ways to go.before they learn to make a good barrel. Take that same Area element max put a quality barrel on it, and I bet it would be accurate. My2cents
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