Comparison of isotopic ratios measured in pre-solar oxide grains (Dauphas et al. 2010; Qin et al. 2011; Nittler et al. 2018) compared to predictions of G14a simulation with NNK weak reaction rates. Open squares are bulk yields of G14aNKK, while green points (lower panels) are individual tracer particles. We note that the scales are different in the upper and lower panels. The dashed lines indicate solar ratios. Grain ⁵⁰Ti/⁴⁸Ti ratios are calculated on the assumption that all measured signal at mass 50 is due to ⁵⁰Ti (i.e., ⁵⁰Cr/⁵²Cr = 0; Nittler et al. 2018).