Before you order those dies from Lee direct, go to Grafs.com. They will have them cheaper and less expensive shipping.
While you're at it, order some Hornady 100gr Spt. Interloks, and Some 100gr Sierra ProHunters.
You will need some IMR4350, and Some Federal #210 primers.
One of the other of these two excellent bullets after breakin should give you sub-moa from your rifle. I use 45.0gr of IMR4350 as a "go to" load. It's always decently accurate. However my rifle prefers 48.5gr if H4831 for same velocity. IMR4831 at 48.0 gives same accuracy and velocity (2,950-3,050fps).
H414 and H380 are superb also, at Hodgdon's recommended max (non-+P) of 45.0 and 44.0gr respectively. (both are over 3,100fps from my gun.. and NOT maximum pressure; just max accurate!!).
For an inexpensive "plinking and small deer hunting, and Coyote load, the PrviPartisan bullets are inexpensive and adequately accurate (1.25-1.5moa). Also, watch
www.midwayusa.com for "blem" bullet sales.... I got 600 of the Hornady 100gr Spt's a couple of years ago for ~8.00/100. Probably a lifetime of shooting for the .257"Bob" and .257Wby. Both will shoot them sub-MOA. The "Bob" at 3,000-3,100fps and the Wby at 3,500-3,600fps. But, the "Bob" does it with much less powder (45.0gr vs. 65.0gr of IMR4350) and weighs 3lbs less........ Out to 300yds, the deer can't tell the difference......!