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Also depends on the rate of twist in the barrels. Normal rate for the 7x57 was about 8.5 to 8.75. Some newer rate of twist is in the 9.25 or higher works for the lighter 140 gr. bullet and still will...

That is the same rifle and cartridge I use for hunting too. I have always enjoyed my M70 Featherweight in 7x57. 44 gr of 4320 with a 140 class bullet means venison on the table.