I dont have a Bob but have been shooting a lot of 250 Sav AI which is a similar beast.
I've just been using some old "non+P" 250 Sav brass along with resized 22-250 brass. Never seen any difference and I am running pressures in the 55-60k PSI zone.
Lots of luck with the 117g Interlock BTSP and the 115g NBT for accuracy and terminal effect. The 100g Hot Cor similarly so.
I also found the 87g Hornady SP held up surprisingly well on game and in wet newspaper tests.
Also find it loves R17 in all bullet weights and H4895 for lighter bullets.
