Can't answer your question..... but..... I really like my CZ 452FS/mannlicher 5 rd mag, and Ruger American carbine 9rd magazine in .22 mag......
today's 22mag ammo is 2000fps and give you "9mm range" of foot lbs of energy out of a 16-18 inch barrel ..... and shoot 1-1.5 inch groups at 100yds.
1000 round weighs in at around 8lbs
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