? on DBM for remington 700

[horse killer]

Thinking about geting a DBM for my new rifle. It is built on a remington 700 with a Kriger 26"" barrel with a Greybull stock and a PTG bolt, Jewell triger in a 28 nosler. My question is what DBM should I get and what size magazine. was looking at PTG DBM with a Accury International magazine.