Hello LCP,
I am new to the forum and have been doing some browsing reading various post and just came along this one. I am also a lefty and own the exact 525 you describe. I am new to trap shooting and tried various loner shotguns. I purchased the 525 due to much research and indeed the left hand palm swell was a great point toward my purchase. I am getting somewhat better at the sport, but nothing to write home about. Anyway the 525 is a great shotgun and a pleasure to shoot. Nice to meet you.
Kindest Regards,
Fred