Re: 338 lapua where to start??
If going 338LM, IIWM forget the 700 action, go Weatherby, CZ or custom.
338Edge is different, while I would prefer a Mark V action, I believe it can be done with a 700 action. Others can comment more on that as the largest 700 I have is a 300RUM. Of course the 375 RUM is a 700 action so you pays you money and you gets you choice.
With a 338WM Wby Mark V or any Wby Mark V in 340Wby you could just rechamber to 338Edge.
Any of the magnum bolt face Wby Mark V actions can be opened up if you choose to go 338LM and then get a new barrel.
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