No.The action length of the bar is to short to except the 338 lapua magnum round.
No.the bar action and receiver is not designed to take that long of a cartridge.
No.
No
Year.
1923 - 1966 had round knobs as standard stocks 1967 and up had flat pistol grips auto5man my browning a-5 made in 1988 in liege belgium has the roung knob stock, and i know it has never been changed. I ask the question " did browning offer both round knobs and pistol grips from 1067 on?"
No
ladybug
behind left valve cover should be round
Same round, different weapon design.
Give it a good cleaning, check the recoil spring.
Yes
Round knob pistol grip.