Christopher, I have run everything through mine. Armscor 36 gr HP, Aquila Super Extra 40gr, Remington Thunderbolt 36 gr, CCI mini-mag 40gr. Only slight chambering issues with Federal Target Grade Performance 40 gr. CCI mini-mag is most consistent in all my 22lr semi-autos.

Christopher, the two consistently high ranked loads for this platform are Winchester M22 and CCI Mini-Mags. budsgunshop.com/catalog/product_info.php/products_id/63201/cci+22+long+rifle+mini+mag+hp+36+grain+hollow+point ------- budsgunshop.com/catalog/product_info.php/products_id/411558304/winchester+ammo+22lr+m22+1255fps+40gr+blk+copr+plted+rn+1000pk

Christopher - Pretty much any commercially available .22 LR will work fine. Since it is a 'fun gun' - and not a precision target rifle - you don't have to worry too much about 'accuracy'. You might fnd some of the sub-sonic stuff won't cycle it consistently, but that just depends on your particular firearm. This thing should eat pretty much anything.

CCI Mini Mags are the best most reliable inexpensive 22lr ammo out there. If a 22 will not work with Mini Mags you need to take it to a gunsmith