Hi Antoine, this rifle is chambered in 22Long Rifle. Cheers and stay safe!

Antoine, before I answer your question, Bud's is not using the correct picture. This is a TALO special Buffalo edition, stock is engraved with 3 buffalo and an Indian on horseback. The leather sling is included.
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Correct pic here >>> https://taloinc.com/product/heritage-rancher-buffalo
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Now to answer your question, this comes with a .22lr cylinder, but will also take .22 magnum (.22wmr) cylinders. I got a .22wmr cylinder for my Rancher.
Available here >>> https://shopheritagemfg.com/cylinders/?_bc_fsnf=1&Caliber=22WMR
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Stay safe & have a great day!