I own 20 Leonard Mews Custom rifles ... Leonard was a personal friend and fellow Gun Club member. His work fit the budget of the customer. Some times he made the stock, and sometimes he only did the checkering. Not everything was fancy, some work was plain. Your rifle has a variation of the Leonard's "Buck Rogers Rocket Pattern" checkering, like number 7 below. (but a bit less detail) This 350 has a plain "Skip-Line" pattern, like number 16 below. Many classic stock makers copied Leonard's style - most notable was Nubs Fashingbauer. If the stock does not have Leonard's stamp in the barrel channel, its not his work. Is your rifle's stock marked with Leonard's stamp in the barrel channel?

http://www.buckstix.com/buckpics/mews-stamp.jpg

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http://www.buckstix.com/buckpics/mews-stocks.jpg

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