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Hi dan and welcome. Yes Sir they do. cheers, stay safe and enjoy!

Hi Dan, they should, I have not tried this specific ammo in my Ruger Mark IV .....The only ammo I have found that cycles reliably in my Mark IV is Federal 40 grain budsgunshop.com/product_info.php/products_id/125584/federal+729b800+range+.22+lr+40+gr+lead+round+nose+800+box , Stay safe & have a great day!