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Hi Lanny and welcome. I have not. Hunting shack lists this at Muzzle velocity 1260 fps & Muzzle energy 1075 ft/lbs. Buffalo Bore - https://www.budsgunshop.com/product_info.php/products_id/80768/buffalo+bore+ammunition+4a+20+heavy+44+rem+mag+305+gr+hard+cast+lead+flat+nose+20+bx+12+cs ---------- is Muzzle Velocity: 1,325 fps & Muzzle Energy: 1,189 ft/lbs. Cheers and stay safe!