I wasn't offended I was pointing you your were saying you had plenty of heavier bullets that would stabilize and it seemed like you might not be realizing the difference of lead core vs mono bullets in terms of density and thus length per weight (IE apples and oranges to compare them). You don't have to call the company, in less than a minute you can plug in the bullet info into a twist rate calculator and your anticipated velocity, twist rate, altitude and see what your stability is. The 1:7 twist rate listed isn't a hard a fast rule, in most cases its a conservative worst case for slow cartridges at sea level. Plug 0.266 G7, 0.277cal, 168grs, 1.726" into here:
http://bergerbullets.com/twist-rate-calculator-3/
No one said you have to follow a practice, we're just saying how we go about hunting with a more expensive mono bullet yet still get in our trigger time. Its a point worth noting since the cost question comes up as you yourself pointed out.