$50 represents 3% of total budget for base custom rifle in the 1.5k range. A rechambered Husqvarna 146 or 640 with a very good bore would supply a fine commercial FN 98 action and a quality barrel, with sights and barrel band swivel stud as a bonus, for a minimal cash layout. But you will have to trust that a 1:14" twist will stabilize the heavyweights. I use 250 and 270gr pills in 9.3x57, 270 and 285 in 9.3x62, 300gr in .375H&H.