I have a 458 Lott with the synthetic stock. I think the synthetic stock turns it into much less of a club. It is still a large action, no doubt.
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I'll bet they hadn't heard of what happened to Winchester in 1965.
Maybe they have some improvements to their present 550 action? The 550s I had in magnum and standard calibers were very accurate but worked better as clubs. I hated the stocks.